CORE/MAC/src/pe/lim/limProcessTdls.c

/*
 * Copyright (c) 2012-2016 The Linux Foundation. All rights reserved.
 *
 * Previously licensed under the ISC license by Qualcomm Atheros, Inc.
 *
 *
 * Permission to use, copy, modify, and/or distribute this software for
 * any purpose with or without fee is hereby granted, provided that the
 * above copyright notice and this permission notice appear in all
 * copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

/*
 * This file was originally distributed by Qualcomm Atheros, Inc.
 * under proprietary terms before Copyright ownership was assigned
 * to the Linux Foundation.
 */

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

                      limProcessTdls.c 

  OVERVIEW:

  DEPENDENCIES:

  Are listed for each API below.
===========================================================================*/

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

                      EDIT HISTORY FOR FILE


  This section contains comments describing changes made to the module.
  Notice that changes are listed in reverse chronological order.


   $Header$$DateTime$$Author$


  when        who     what, where, why
----------    ---    --------------------------------------------------------
05/05/2010   Ashwani    Initial Creation, added TDLS action frame functionality,
                         TDLS message exchange with SME..etc..

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


/**
 * \file limProcessTdls.c
 *
 * \brief Code for preparing,processing and sending 802.11z action frames
 *
 */

#ifdef FEATURE_WLAN_TDLS

#include "sirApi.h"
#include "aniGlobal.h"
#include "sirMacProtDef.h"
#include "cfgApi.h"
#include "utilsApi.h"
#include "limTypes.h"
#include "limUtils.h"
#include "limSecurityUtils.h"
#include "dot11f.h"
#include "limStaHashApi.h"
#include "schApi.h"
#include "limSendMessages.h"
#include "utilsParser.h"
#include "limAssocUtils.h"
#include "dphHashTable.h"
#include "wlan_qct_wda.h"

/* define NO_PAD_TDLS_MIN_8023_SIZE to NOT padding: See CR#447630
There was IOT issue with cisco 1252 open mode, where it pads
discovery req/teardown frame with some junk value up to min size.
To avoid this issue, we pad QCOM_VENDOR_IE.
If there is other IOT issue because of this bandage, define NO_PAD...
*/
#ifndef NO_PAD_TDLS_MIN_8023_SIZE
#define MIN_IEEE_8023_SIZE              46
#define MIN_VENDOR_SPECIFIC_IE_SIZE     5
#endif

static tSirRetStatus limTdlsSetupAddSta(tpAniSirGlobal pMac,
                                        tSirTdlsAddStaReq *pAddStaReq,
                                        tpPESession psessionEntry) ;
void PopulateDot11fLinkIden(tpAniSirGlobal pMac, tpPESession psessionEntry,
                          tDot11fIELinkIdentifier *linkIden, 
                             tSirMacAddr peerMac, tANI_U8 reqType) ;
void PopulateDot11fTdlsExtCapability(tpAniSirGlobal pMac, 
                                    tDot11fIEExtCap *extCapability) ;

void PopulateDot11fTdlsOffchannelParams(tpAniSirGlobal pMac,
          tpPESession psessionEntry,
          tDot11fIESuppChannels *suppChannels,
          tDot11fIESuppOperatingClasses *suppOperClasses);

void limLogVHTCap(tpAniSirGlobal pMac,
                              tDot11fIEVHTCaps *pDot11f);
tSirRetStatus limPopulateVhtMcsSet(tpAniSirGlobal pMac,
                                  tpSirSupportedRates pRates,
                                  tDot11fIEVHTCaps *pPeerVHTCaps,
                                  tpPESession psessionEntry);
ePhyChanBondState  limGetHTCBState(ePhyChanBondState aniCBMode);
/*only 31 op classes are available, 1 entry for current op class*/
static tDot11fIESuppOperatingClasses op_classes = {0};

op_class_map_t global_op_class[] = {
    {81, 25,  BW20,      {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}},
    {82, 25,  BW20,      {14}},
    {83, 40,  BW40PLUS,  {1, 2, 3, 4, 5, 6, 7, 8, 9}},
    {84, 40,  BW40MINUS, {5, 6, 7, 8, 9, 10, 11, 12, 13}},
    {115, 20, BW20,      {36, 40, 44, 48}},
    {116, 40, BW40PLUS,  {36, 44}},
    {117, 40, BW40MINUS, {40, 48}},
    {118, 20, BW20,      {52, 56, 60, 64}},
    {119, 40, BW40PLUS,  {52, 60}},
    {120, 40, BW40MINUS, {56, 64}},
    {121, 20, BW20,   {100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140}},
    {122, 40, BW40PLUS,  {100, 108, 116, 124, 132}},
    {123, 40, BW40MINUS, {104, 112, 120, 128, 136}},
    {125, 20, BW20,      {149, 153, 157, 161, 165, 169}},
    {126, 40, BW40PLUS,  {149, 157}},
    {127, 40, BW40MINUS, {153, 161}},
    {128, 80, BW80,      {36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112,
                          116, 120, 124, 128, 132, 136, 140, 144,
                          149, 153, 157, 161}},
    {0, 0, 0, {0}},

};/*end global_op_class*/

op_class_map_t us_op_class[] = {
    {1, 20,  BW20,       {36, 40, 44, 48}},
    {2, 20,  BW20,       {52, 56, 60, 64}},
    {4, 20,  BW20,   {100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144}},
    {5, 20,  BW20,       {149, 153, 157, 161, 165}},
    {12, 25, BW20,      {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}},
    {22, 40, BW40PLUS,  {36, 44}},
    {23, 40, BW40PLUS,  {52, 60}},
    {24, 40, BW40PLUS,  {100, 108, 116, 124, 132, 140}},
    {26, 40, BW40PLUS,  {149, 157}},
    {27, 40, BW40MINUS, {40, 48}},
    {28, 40, BW40MINUS, {56, 64}},
    {29, 40, BW40MINUS, {104, 112, 120, 128, 136, 144}},
    {31, 40, BW40MINUS, {153, 161}},
    {32, 40, BW40PLUS,  {1, 2, 3, 4, 5, 6, 7}},
    {33, 40, BW40MINUS, {5, 6, 7, 8, 9, 10, 11}},
    {128, 80, BW80,     {36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112,
                         116, 120, 124, 128, 132, 136, 140, 144,
                         149, 153, 157, 161}},
    {0, 0, 0, {0}},
};/*end us_op_class*/

op_class_map_t euro_op_class[] = {
    {1, 20,  BW20,      {36, 40, 44, 48}},
    {2, 20,  BW20,      {52, 56, 60, 64}},
    {3, 20,  BW20,   {100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140}},
    {4, 25,  BW20,      {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}},
    {5, 40,  BW40PLUS,  {36, 44}},
    {6, 40,  BW40PLUS,  {52, 60}},
    {7, 40,  BW40PLUS,  {100, 108, 116, 124, 132}},
    {8, 40,  BW40MINUS, {40, 48}},
    {9, 40,  BW40MINUS, {56, 64}},
    {10, 40, BW40MINUS, {104, 112, 120, 128, 136}},
    {11, 40, BW40PLUS,  {1, 2, 3, 4, 5, 6, 7, 8, 9}},
    {12, 40, BW40MINUS, {5, 6, 7, 8, 9, 10, 11, 12, 13}},
    {17, 20, BW20,      {149, 153, 157, 161, 165, 169}},
    {128, 80, BW80,     {36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112,
                         116, 120, 124, 128}},
    {0, 0, 0, {0}},
};/*end euro_op_class*/

op_class_map_t japan_op_class[] = {
    {1, 20,  BW20,      {36, 40, 44, 48}},
    {30, 25, BW20,      {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}},
    {31, 25, BW20,      {14}},
    {32, 20, BW20,      {52, 56, 60, 64}},
    {34, 20, BW20,   {100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140}},
    {36, 40, BW40PLUS,  {36, 44}},
    {37, 40, BW40PLUS,  {52, 60}},
    {39, 40, BW40PLUS,  {100, 108, 116, 124, 132}},
    {41, 40, BW40MINUS, {40, 48}},
    {42, 40, BW40MINUS, {56, 64}},
    {44, 40, BW40MINUS, {104, 112, 120, 128, 136}},
    {128, 80, BW80,     {36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112,
                         116, 120, 124, 128}},
    {0, 0, 0, {0}},
};/*end japan_op_class*/

/*
 * TDLS data frames will go out/come in as non-qos data.
 * so, eth_890d_header will be aligned access..
 */
static const tANI_U8 eth_890d_header[] = 
{ 
    0xaa, 0xaa, 0x03, 0x00, 
    0x00, 0x00, 0x89, 0x0d,
} ;

/* store tdls self supported channels
 * which are non passive */
#define LIM_TDLS_MAX_NON_DFS_CHANNELS 50
static tANI_U8 tdlsSelfNumChans = 0;
static tANI_U8 tdlsSelfSupportedChannels[LIM_TDLS_MAX_NON_DFS_CHANNELS] = {0};

/*
 * type of links used in TDLS 
 */
enum tdlsLinks
{
    TDLS_LINK_AP,
    TDLS_LINK_DIRECT
} eTdlsLink ;

/* 
 * node status in node searching
 */
enum tdlsLinkNodeStatus
{
    TDLS_NODE_NOT_FOUND,
    TDLS_NODE_FOUND
} eTdlsLinkNodeStatus ;


enum tdlsReqType
{
    TDLS_INITIATOR,
    TDLS_RESPONDER
} eTdlsReqType ;

typedef enum tdlsLinkSetupStatus
{
    TDLS_SETUP_STATUS_SUCCESS = 0,
    TDLS_SETUP_STATUS_FAILURE = 37
}etdlsLinkSetupStatus ;

/* These maps to Kernel TDLS peer capability
 * flags and should get changed as and when necessary
 */
enum tdls_peer_capability {
        TDLS_PEER_HT_CAP  = 0,
        TDLS_PEER_VHT_CAP = 1,
        TDLS_PEER_WMM_CAP = 2
} eTdlsPeerCapability;

/* some local defines */
#define LINK_IDEN_BSSID_OFFSET      (0)
#define PEER_MAC_OFFSET   (12) 
#define STA_MAC_OFFSET    (6)
#define LINK_IDEN_ELE_ID  (101)
//#define LINK_IDEN_LENGTH   (18) 
#define LINK_IDEN_ADDR_OFFSET(x) (&x.LinkIdentifier)
#define PTI_LINK_IDEN_OFFSET     (5)
#define PTI_BUF_STATUS_OFFSET    (25)

/* TODO, Move this parameters to configuration */
#define PEER_PSM_SUPPORT          (0)
#define PEER_BUFFER_STA_SUPPORT   (0)
#define CH_SWITCH_SUPPORT         (0)
#define TDLS_SUPPORT              (1)
#define TDLS_PROHIBITED           (0)
#define TDLS_CH_SWITCH_PROHIBITED (1)
/** @brief Set bit manipulation macro */
#define SET_BIT(value,mask)       ((value) |= (1 << (mask)))
/** @brief Clear bit manipulation macro */
#define CLEAR_BIT(value,mask)     ((value) &= ~(1 << (mask)))
/** @brief Check bit manipulation macro */
#define CHECK_BIT(value, mask)    ((value) & (1 << (mask)))

#define SET_PEER_AID_BITMAP(peer_bitmap, aid) \
                                if ((aid) < (sizeof(tANI_U32) << 3)) \
                                        SET_BIT(peer_bitmap[0], (aid)); \
                                else if ((aid) < (sizeof(tANI_U32) << 4)) \
                                        SET_BIT(peer_bitmap[1], ((aid) - (sizeof(tANI_U32) << 3)));

#define CLEAR_PEER_AID_BITMAP(peer_bitmap, aid) \
                                if ((aid) < (sizeof(tANI_U32) << 3)) \
                                        CLEAR_BIT(peer_bitmap[0], (aid)); \
                                else if ((aid) < (sizeof(tANI_U32) << 4)) \
                                        CLEAR_BIT(peer_bitmap[1], ((aid) - (sizeof(tANI_U32) << 3)));


#ifdef LIM_DEBUG_TDLS

#ifdef FEATURE_WLAN_TDLS
#define WNI_CFG_TDLS_DISCOVERY_RSP_WAIT             (100)
#define WNI_CFG_TDLS_LINK_SETUP_RSP_TIMEOUT         (800)
#define WNI_CFG_TDLS_LINK_SETUP_CNF_TIMEOUT         (200)
#endif

#define IS_QOS_ENABLED(psessionEntry) ((((psessionEntry)->limQosEnabled) && \
                                                  SIR_MAC_GET_QOS((psessionEntry)->limCurrentBssCaps)) || \
                                       (((psessionEntry)->limWmeEnabled ) && \
                                                  LIM_BSS_CAPS_GET(WME, (psessionEntry)->limCurrentBssQosCaps)))

#define TID_AC_VI                  4
#define TID_AC_BK                  1

const tANI_U8* limTraceTdlsActionString( tANI_U8 tdlsActionCode )
{
   switch( tdlsActionCode )
   {
       CASE_RETURN_STRING(SIR_MAC_TDLS_SETUP_REQ);
       CASE_RETURN_STRING(SIR_MAC_TDLS_SETUP_RSP);
       CASE_RETURN_STRING(SIR_MAC_TDLS_SETUP_CNF);
       CASE_RETURN_STRING(SIR_MAC_TDLS_TEARDOWN);
       CASE_RETURN_STRING(SIR_MAC_TDLS_PEER_TRAFFIC_IND);
       CASE_RETURN_STRING(SIR_MAC_TDLS_CH_SWITCH_REQ);
       CASE_RETURN_STRING(SIR_MAC_TDLS_CH_SWITCH_RSP);
       CASE_RETURN_STRING(SIR_MAC_TDLS_PEER_TRAFFIC_RSP);
       CASE_RETURN_STRING(SIR_MAC_TDLS_DIS_REQ);
       CASE_RETURN_STRING(SIR_MAC_TDLS_DIS_RSP);
   }
   return (const tANI_U8*)"UNKNOWN";
}
#endif
#if 0
static void printMacAddr(tSirMacAddr macAddr)
{
    int i = 0 ;
    VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_ERROR, (" Mac Addr: "));

    for(i = 0 ; i < 6; i++)
    {
        VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_ERROR, 
                                                 (" %02x "), macAddr[i]);
    }
    VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_ERROR, (""));
    return ;
}
#endif
/*
 * initialize TDLS setup list and related data structures.
 */
void limInitTdlsData(tpAniSirGlobal pMac, tpPESession pSessionEntry)
{
    limInitPeerIdxpool(pMac, pSessionEntry) ;

    return ;
}
#ifdef FEATURE_WLAN_TDLS_NEGATIVE
void limTdlsSetNegativeBehavior(tpAniSirGlobal pMac, tANI_U8 value, tANI_BOOLEAN on)
{
    if(on) {
        if(value == 255)
            pMac->lim.gLimTdlsNegativeBehavior = 0XFFFFFFFF;
        else
            pMac->lim.gLimTdlsNegativeBehavior |= (1 << (value-1));
    }
    else {
        if(value == 255)
            pMac->lim.gLimTdlsNegativeBehavior = 0;
        else
            pMac->lim.gLimTdlsNegativeBehavior &= ~(1 << (value-1));
    }
    LIM_LOG_TDLS(VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_ERROR,("%d %d -> gLimTdlsNegativeBehavior= 0x%lx"),
        value, on, pMac->lim.gLimTdlsNegativeBehavior));
}
#endif
#if 0
/*
 * This function is used for creating TDLS public Action frame to
 * transmit on Direct link
 */
static void limPreparesActionFrameHdr(tpAniSirGlobal pMac, tANI_U8 *pFrame,
                                         tANI_U8 type, tANI_U8 subType,
                                                   tANI_U8 *link_iden )
{
    tpSirMacMgmtHdr pMacHdr ;
    tANI_U8 *bssid = link_iden ;
#if 0     
    tANI_U8 *staMac = (tANI_U8 *)(bssid + sizeof(tSirMacAddr)) ;
    tANI_U8 *peerMac = (tANI_U8 *) (staMac + sizeof(tSirMacAddr)) ;
#else    
   tANI_U8 *peerMac = (tANI_U8 *) (bssid + sizeof(tSirMacAddr)) ;
   tANI_U8 *staMac = (tANI_U8 *)(peerMac + sizeof(tSirMacAddr)) ;
#endif    
    tANI_U8 toDs =  ANI_TXDIR_IBSS  ;

    pMacHdr = (tpSirMacMgmtHdr) (pFrame);

    /*
     * prepare 802.11 header
     */ 
    pMacHdr->fc.protVer = SIR_MAC_PROTOCOL_VERSION;
    pMacHdr->fc.type    = type ;
    pMacHdr->fc.subType = subType ;
    /*
     * TL is not setting up below fields, so we are doing it here
     */
    pMacHdr->fc.toDS    = toDs ;
    pMacHdr->fc.powerMgmt = 0 ;

     
    vos_mem_copy( (tANI_U8 *) pMacHdr->da, peerMac, sizeof( tSirMacAddr ));
    vos_mem_copy( (tANI_U8 *) pMacHdr->sa,
                   staMac, sizeof( tSirMacAddr ));

    vos_mem_copy( (tANI_U8 *) pMacHdr->bssId,
                                bssid, sizeof( tSirMacAddr ));
   
   LIM_LOG_TDLS(VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_WARN, ("Preparing TDLS action frame\n%02x:%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x:%02x"),
       pMacHdr->da[0], pMacHdr->da[1], pMacHdr->da[2], pMacHdr->da[3], pMacHdr->da[4], pMacHdr->da[5],
       pMacHdr->sa[0], pMacHdr->sa[1], pMacHdr->sa[2], pMacHdr->sa[3], pMacHdr->sa[4], pMacHdr->sa[5],
       pMacHdr->bssId[0], pMacHdr->bssId[1], pMacHdr->bssId[2],
       pMacHdr->bssId[3], pMacHdr->bssId[4], pMacHdr->bssId[5]));

    return ; 
}
#endif
/*
 * prepare TDLS frame header, it includes
 * |             |              |                |
 * |802.11 header|RFC1042 header|TDLS_PYLOAD_TYPE|PAYLOAD
 * |             |              |                |
 */
static tANI_U32 limPrepareTdlsFrameHeader(tpAniSirGlobal pMac, tANI_U8* pFrame, 
           tDot11fIELinkIdentifier *link_iden, tANI_U8 tdlsLinkType, tANI_U8 reqType,
           tANI_U8 tid, tpPESession psessionEntry)
{
    tpSirMacDataHdr3a pMacHdr ;
    tANI_U32 header_offset = 0 ;
    tANI_U8 *addr1 = NULL ;
    tANI_U8 *addr3 = NULL ;
    tpDphHashNode pStaDs = NULL;
    tANI_U16      aid = 0;
    tANI_U8       qosMode = 0;

    tANI_U8 toDs = (tdlsLinkType == TDLS_LINK_AP) 
                                       ? ANI_TXDIR_TODS :ANI_TXDIR_IBSS  ;
    tANI_U8 *peerMac = (reqType == TDLS_INITIATOR) 
                                       ? link_iden->RespStaAddr : link_iden->InitStaAddr; 
    tANI_U8 *staMac = (reqType == TDLS_INITIATOR) 
                                       ? link_iden->InitStaAddr : link_iden->RespStaAddr; 
    pMacHdr = (tpSirMacDataHdr3a) (pFrame);

    /* 
     * if TDLS frame goes through the AP link, it follows normal address
     * pattern, if TDLS frame goes thorugh the direct link, then
     * A1--> Peer STA addr, A2-->Self STA address, A3--> BSSID
     */
    (tdlsLinkType == TDLS_LINK_AP) ? ((addr1 = (link_iden->bssid)),
                                      (addr3 = (peerMac))) 
                                   : ((addr1 = (peerMac)),
                                     (addr3 = (link_iden->bssid))) ;
    /*
     * prepare 802.11 header
     */ 
    pMacHdr->fc.protVer = SIR_MAC_PROTOCOL_VERSION;
    pMacHdr->fc.type    = SIR_MAC_DATA_FRAME ;

    pStaDs = dphLookupHashEntry(pMac, peerMac, &aid,
                                     &psessionEntry->dph.dphHashTable);
    if (pStaDs)
    {
        qosMode = pStaDs->qosMode;
    }

    pMacHdr->fc.subType = ((IS_QOS_ENABLED(psessionEntry) &&
                           (tdlsLinkType == TDLS_LINK_AP)) ||
                           ((tdlsLinkType == TDLS_LINK_DIRECT) && qosMode))
                           ? SIR_MAC_DATA_QOS_DATA : SIR_MAC_DATA_DATA;

    /*
     * TL is not setting up below fields, so we are doing it here
     */
    pMacHdr->fc.toDS    = toDs ;
    pMacHdr->fc.powerMgmt = 0 ;
    pMacHdr->fc.wep = (psessionEntry->encryptType == eSIR_ED_NONE)? 0 : 1;

     
    vos_mem_copy( (tANI_U8 *) pMacHdr->addr1,
                  (tANI_U8 *)addr1,
                  sizeof( tSirMacAddr ));
    vos_mem_copy( (tANI_U8 *) pMacHdr->addr2,
                  (tANI_U8 *) staMac,
                  sizeof( tSirMacAddr ));

    vos_mem_copy( (tANI_U8 *) pMacHdr->addr3,
                  (tANI_U8 *) (addr3),
                  sizeof( tSirMacAddr ));

    limLog(pMac, LOG1,
           FL("Preparing TDLS frame header to %s A1:"MAC_ADDRESS_STR", A2:"MAC_ADDRESS_STR", A3:"MAC_ADDRESS_STR),
           (tdlsLinkType == TDLS_LINK_AP) ? "AP" : "DIRECT",
           MAC_ADDR_ARRAY(pMacHdr->addr1),
           MAC_ADDR_ARRAY(pMacHdr->addr2),
           MAC_ADDR_ARRAY(pMacHdr->addr3));

    //printMacAddr(pMacHdr->bssId) ;
    //printMacAddr(pMacHdr->sa) ;
    //printMacAddr(pMacHdr->da) ;

    if (((tdlsLinkType == TDLS_LINK_AP) && (IS_QOS_ENABLED(psessionEntry))) ||
        ((tdlsLinkType == TDLS_LINK_DIRECT) && qosMode))
    {
        pMacHdr->qosControl.tid = tid;
        header_offset += sizeof(tSirMacDataHdr3a);
    }
    else
        header_offset += sizeof(tSirMacMgmtHdr);

    /* 
     * Now form RFC1042 header
     */
    vos_mem_copy((tANI_U8 *)(pFrame + header_offset),
                 (tANI_U8 *)eth_890d_header, sizeof(eth_890d_header)) ;

    header_offset += sizeof(eth_890d_header) ; 

    /* add payload type as TDLS */
    *(pFrame + header_offset) = PAYLOAD_TYPE_TDLS ;

    return(header_offset += PAYLOAD_TYPE_TDLS_SIZE) ; 
}

/*
 * TX Complete for Management frames
 */
 eHalStatus limMgmtTXComplete(tpAniSirGlobal pMac,
                                   void *pData)
{
    tANI_U32 txCompleteSuccess = 0;
    tpSirTxBdStatus pTxBdStatus = NULL;

    if (!pData)
    {
        limLog(pMac, LOGE, FL("pData is NULL"));
        return eHAL_STATUS_SUCCESS;
    }

    if (IS_FEATURE_SUPPORTED_BY_FW(ENHANCED_TXBD_COMPLETION))
    {
        pTxBdStatus = (tpSirTxBdStatus) pData;
        txCompleteSuccess = pTxBdStatus->txCompleteStatus;
        limLog(pMac, LOG1, FL("txCompleteSuccess %u, token %u"),
                txCompleteSuccess, pTxBdStatus->txBdToken);
    }
    else
    {
        txCompleteSuccess = *((tANI_U32*) pData);
        limLog(pMac, LOG1, FL("txCompleteSuccess %u"), txCompleteSuccess);
    }

    if (0xff != pMac->lim.mgmtFrameSessionId)
    {
        limSendSmeMgmtTXCompletion(pMac, pMac->lim.mgmtFrameSessionId,
                                   txCompleteSuccess);
        pMac->lim.mgmtFrameSessionId = 0xff;
    }
    return eHAL_STATUS_SUCCESS;
}

/*
 * This function can be used for bacst or unicast discovery request
 * We are not differentiating it here, it will all depnds on peer MAC address,
 */
tSirRetStatus limSendTdlsDisReqFrame(tpAniSirGlobal pMac, tSirMacAddr peer_mac,
                                      tANI_U8 dialog, tpPESession psessionEntry)
{
    tDot11fTDLSDisReq   tdlsDisReq ;
    tANI_U32            status = 0 ;
    tANI_U32            nPayload = 0 ;
    tANI_U32            size = 0 ;
    tANI_U32            nBytes = 0 ;
    tANI_U32            header_offset = 0 ;
    tANI_U8            *pFrame;
    void               *pPacket;
    eHalStatus          halstatus;
#ifndef NO_PAD_TDLS_MIN_8023_SIZE
    tANI_U32            padLen = 0;
#endif

    /* 
     * The scheme here is to fill out a 'tDot11fProbeRequest' structure
     * and then hand it off to 'dot11fPackProbeRequest' (for
     * serialization).  We start by zero-initializing the structure:
     */
    vos_mem_set( (tANI_U8*)&tdlsDisReq,
                  sizeof( tDot11fTDLSDisReq ), 0 );

    /*
     * setup Fixed fields,
     */
    tdlsDisReq.Category.category = SIR_MAC_ACTION_TDLS ;
    tdlsDisReq.Action.action     = SIR_MAC_TDLS_DIS_REQ ;
    tdlsDisReq.DialogToken.token = dialog ;


    size = sizeof(tSirMacAddr) ;
   
    PopulateDot11fLinkIden( pMac, psessionEntry, &tdlsDisReq.LinkIdentifier, 
                                                 peer_mac, TDLS_INITIATOR) ;

    /* 
     * now we pack it.  First, how much space are we going to need?
     */
    status = dot11fGetPackedTDLSDisReqSize( pMac, &tdlsDisReq, &nPayload);
    if ( DOT11F_FAILED( status ) )
    {
        limLog(pMac, LOGE,
               FL("Failed to calculate the packed size for a discovery Request (0x%08x)."),
               status);
        /* We'll fall back on the worst case scenario: */
        nPayload = sizeof( tDot11fTDLSDisReq );
    }
    else if ( DOT11F_WARNED( status ) )
    {
        limLog(pMac, LOGW,
               FL("There were warnings while calculating the packed size for a discovery Request (0x%08x)."),
               status);
    }

    /*
     * This frame is going out from PE as data frames with special ethertype
     * 89-0d.
     * 8 bytes of RFC 1042 header
     */ 


    nBytes = nPayload + ((IS_QOS_ENABLED(psessionEntry))
                              ? sizeof(tSirMacDataHdr3a) : sizeof(tSirMacMgmtHdr))
                      + sizeof( eth_890d_header )
                      + PAYLOAD_TYPE_TDLS_SIZE ;

#ifndef NO_PAD_TDLS_MIN_8023_SIZE
    /* IOT issue with some AP : some AP doesn't like the data packet size < minimum 802.3 frame length (64)
       Hence AP itself padding some bytes, which caused teardown packet is dropped at
       receiver side. To avoid such IOT issue, we added some extra bytes to meet data frame size >= 64
     */
    if (nPayload + PAYLOAD_TYPE_TDLS_SIZE < MIN_IEEE_8023_SIZE)
    {
        padLen = MIN_IEEE_8023_SIZE - (nPayload + PAYLOAD_TYPE_TDLS_SIZE ) ;

        /* if padLen is less than minimum vendorSpecific (5), pad up to 5 */
        if (padLen < MIN_VENDOR_SPECIFIC_IE_SIZE)
            padLen = MIN_VENDOR_SPECIFIC_IE_SIZE;

        nBytes += padLen;
    }
#endif

    /* Ok-- try to allocate memory from MGMT PKT pool */

    halstatus = palPktAlloc( pMac->hHdd, HAL_TXRX_FRM_802_11_MGMT,
                             ( tANI_U16 )nBytes, ( void** ) &pFrame,
                             ( void** ) &pPacket );
    if ( ! HAL_STATUS_SUCCESS ( halstatus ) )
    {
        limLog(pMac, LOGE,
               FL("Failed to allocate %d bytes for a TDLS Discovery Request."),
               nBytes);
        return eSIR_MEM_ALLOC_FAILED;
    }

    /* zero out the memory */
    vos_mem_set( pFrame, nBytes, 0 );

    /* 
     * IE formation, memory allocation is completed, Now form TDLS discovery
     * request frame
     */

    /* fill out the buffer descriptor */

    header_offset = limPrepareTdlsFrameHeader(pMac, pFrame, 
           LINK_IDEN_ADDR_OFFSET(tdlsDisReq), TDLS_LINK_AP, TDLS_INITIATOR, TID_AC_VI, psessionEntry) ;

#ifdef FEATURE_WLAN_TDLS_NEGATIVE
    if(pMac->lim.gLimTdlsNegativeBehavior & LIM_TDLS_NEGATIVE_WRONG_BSSID_IN_DSCV_REQ)
    {
        tdlsDisReq.LinkIdentifier.bssid[4] = 0xde;
        tdlsDisReq.LinkIdentifier.bssid[5] = 0xad; 
        VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_ERROR, 
        ("TDLS negative running: wrong BSSID " MAC_ADDRESS_STR " in TDLS Discovery Req"),
        MAC_ADDR_ARRAY(tdlsDisReq.LinkIdentifier.bssid));
    }
#endif
    status = dot11fPackTDLSDisReq( pMac, &tdlsDisReq, pFrame 
                               + header_offset, nPayload, &nPayload );

    if ( DOT11F_FAILED( status ) )
    {
        limLog(pMac, LOGE, FL("Failed to pack a TDLS discovery req (0x%08x)."),
               status);
        palPktFree( pMac->hHdd, HAL_TXRX_FRM_802_11_MGMT, 
                                   ( void* ) pFrame, ( void* ) pPacket );
        return eSIR_FAILURE;
    }
    else if ( DOT11F_WARNED( status ) )
    {
        limLog(pMac, LOGW, FL("There were warnings while packing TDLS Discovery Request (0x%08x)."),
               status);
    }

#ifndef NO_PAD_TDLS_MIN_8023_SIZE
    if (padLen != 0)
    {
        /* QCOM VENDOR OUI = { 0x00, 0xA0, 0xC6, type = 0x0000 }; */
        tANI_U8 *padVendorSpecific = pFrame + header_offset + nPayload;
        /* make QCOM_VENDOR_OUI, and type = 0x0000, and all the payload to be zero */
        padVendorSpecific[0] = 221;
        padVendorSpecific[1] = padLen - 2;
        padVendorSpecific[2] = 0x00;
        padVendorSpecific[3] = 0xA0;
        padVendorSpecific[4] = 0xC6;

        limLog(pMac, LOG1, FL("Padding Vendor Specific Ie Len = %d"), padLen);

        /* padding zero if more than 5 bytes are required */
        if (padLen > MIN_VENDOR_SPECIFIC_IE_SIZE)
            vos_mem_set( pFrame + header_offset + nPayload + MIN_VENDOR_SPECIFIC_IE_SIZE,
                         padLen - MIN_VENDOR_SPECIFIC_IE_SIZE, 0);
    }
#endif

    limLog(pMac, LOG1,
           FL("[TDLS] action %d (%s) -AP-> OTA peer="MAC_ADDRESS_STR),
           SIR_MAC_TDLS_DIS_REQ,
           limTraceTdlsActionString(SIR_MAC_TDLS_DIS_REQ),
           MAC_ADDR_ARRAY(peer_mac));

    halstatus = halTxFrameWithTxComplete( pMac, pPacket, ( tANI_U16 ) nBytes,
                            HAL_TXRX_FRM_802_11_DATA,
                            ANI_TXDIR_TODS,
                            TID_AC_VI,
                            limTxComplete, pFrame,
                            limMgmtTXComplete,
                            HAL_USE_BD_RATE2_FOR_MANAGEMENT_FRAME |
                                HAL_USE_PEER_STA_REQUESTED_MASK,
                            pMac->lim.txBdToken++);
    if ( ! HAL_STATUS_SUCCESS ( halstatus ) )
    {
        pMac->lim.mgmtFrameSessionId = 0xff;
        limLog(pMac, LOGE, FL("could not send TDLS Discovery Request frame"));
        return eSIR_FAILURE;
    }
    pMac->lim.mgmtFrameSessionId = psessionEntry->smeSessionId;

    return eSIR_SUCCESS;

}

/*
 * This static function is consistent with any kind of TDLS management
 * frames we are sending. Currently it is being used by limSendTdlsDisRspFrame,
 * limSendTdlsLinkSetupReqFrame and limSendTdlsSetupRspFrame
 */
static void PopulateDot11fTdlsHtVhtCap(tpAniSirGlobal pMac, uint32 selfDot11Mode,
                                        tDot11fIEHTCaps *htCap, tDot11fIEVHTCaps *vhtCap,
                                        tpPESession psessionEntry)
{
    if (IS_DOT11_MODE_HT(selfDot11Mode))
    {
        /* Include HT Capability IE */
        PopulateDot11fHTCaps( pMac, NULL, htCap );
        /* Advertize ht capability and max supported channel
         * bandwidth when populating HT IE in TDLS Setup Request/
         * Setup Response/Setup Confirmation frames.
         * 11.21.6.2 Setting up a 40 MHz direct link: A 40 MHz off-channel
         * direct link may be started if both TDLS peer STAs indicated
         * 40 MHz support in the Supported Channel Width Set field of the
         * HT Capabilities element (which is included in the TDLS Setup Request
         * frame and the TDLS Setup Response frame). Switching to a 40 MHz
         * off-channel direct link is achieved by including the following
         * information in the TDLS Channel Switch Request
         * 11.21.1 General: The channel width of the TDLS direct link on the
         * base channel shall not exceed the channel width of the BSS to which
         * the TDLS peer STAs are associated.*/
        htCap->present = 1;
        htCap->supportedChannelWidthSet = 1; // hardcode it to max
    }
    else
    {
        htCap->present = 0;
    }
    limLog(pMac, LOG1, FL("HT present = %hu, Chan Width = %hu"),
            htCap->present, htCap->supportedChannelWidthSet);
#ifdef WLAN_FEATURE_11AC
    if (IS_DOT11_MODE_VHT(selfDot11Mode) &&
        IS_FEATURE_SUPPORTED_BY_FW(DOT11AC))
    {
        /* Include VHT Capability IE */
        PopulateDot11fVHTCaps( pMac, vhtCap,
                 psessionEntry->currentOperChannel, eSIR_FALSE );
    }
    else
    {
        vhtCap->present = 0;
    }
    limLog(pMac, LOG1, FL("VHT present = %hu"),
            vhtCap->present);
#endif
}

/*
 * Send TDLS discovery response frame on direct link.
 */

static tSirRetStatus limSendTdlsDisRspFrame(tpAniSirGlobal pMac,
                     tSirMacAddr peerMac, tANI_U8 dialog,
                     tpPESession psessionEntry, tANI_U8 *addIe,
                     tANI_U16 addIeLen)
{
    tDot11fTDLSDisRsp   tdlsDisRsp ;
    tANI_U16            caps = 0 ;
    tANI_U32            status = 0 ;
    tANI_U32            nPayload = 0 ;
    tANI_U32            nBytes = 0 ;
    tANI_U8            *pFrame;
    void               *pPacket;
    eHalStatus          halstatus;
    uint32              selfDot11Mode;
//  Placeholder to support different channel bonding mode of TDLS than AP.
//  Today, WNI_CFG_CHANNEL_BONDING_MODE will be overwritten when connecting to AP
//  To support this feature, we need to introduce WNI_CFG_TDLS_CHANNEL_BONDING_MODE
//  As of now, we hardcoded to max channel bonding of dot11Mode (i.e HT80 for 11ac/HT40 for 11n)
//  uint32 tdlsChannelBondingMode;

    /*
     * The scheme here is to fill out a 'tDot11fProbeRequest' structure
     * and then hand it off to 'dot11fPackProbeRequest' (for
     * serialization).  We start by zero-initializing the structure:
     */
    vos_mem_set( ( tANI_U8* )&tdlsDisRsp,
                                      sizeof( tDot11fTDLSDisRsp ), 0 );

    /*
     * setup Fixed fields,
     */
    tdlsDisRsp.Category.category = SIR_MAC_ACTION_PUBLIC_USAGE;
    tdlsDisRsp.Action.action     = SIR_MAC_TDLS_DIS_RSP ;
    tdlsDisRsp.DialogToken.token = dialog ;

    PopulateDot11fLinkIden( pMac, psessionEntry, &tdlsDisRsp.LinkIdentifier,
                                           peerMac, TDLS_RESPONDER) ;

    if (cfgGetCapabilityInfo(pMac, &caps, psessionEntry) != eSIR_SUCCESS)
    {
        /*
         * Could not get Capabilities value
         * from CFG. Log error.
         */
         limLog(pMac, LOGP, FL("could not retrieve Capabilities value"));
    }
    swapBitField16(caps, ( tANI_U16* )&tdlsDisRsp.Capabilities );

    /* populate supported rate and ext supported rate IE */
    if (eSIR_FAILURE == PopulateDot11fRatesTdls(pMac, &tdlsDisRsp.SuppRates,
                               &tdlsDisRsp.ExtSuppRates,
                               psessionEntry->currentOperChannel))
        limLog(pMac, LOGE, FL("could not populate supported data rates"));

    /* Populate extended capability IE */
    PopulateDot11fTdlsExtCapability( pMac, &tdlsDisRsp.ExtCap );

    wlan_cfgGetInt(pMac,WNI_CFG_DOT11_MODE,&selfDot11Mode);

    /* Populate HT/VHT Capabilities */
    PopulateDot11fTdlsHtVhtCap( pMac, selfDot11Mode, &tdlsDisRsp.HTCaps,
                               &tdlsDisRsp.VHTCaps, psessionEntry );

    if ( 1 == pMac->lim.gLimTDLSOffChannelEnabled )
        PopulateDot11fTdlsOffchannelParams( pMac, psessionEntry,
                                            &tdlsDisRsp.SuppChannels,
                                            &tdlsDisRsp.SuppOperatingClasses);

    if (TRUE == pMac->lim.EnableTdls2040BSSCoexIE)
    {
        if ( 1 == pMac->lim.gLimTDLSOffChannelEnabled &&
            ( pMac->roam.configParam.bandCapability != eCSR_BAND_24) )
        {
            tdlsDisRsp.HT2040BSSCoexistence.present = 1;
            tdlsDisRsp.HT2040BSSCoexistence.infoRequest = 1;
        }
    }
    /* 
     * now we pack it.  First, how much space are we going to need?
     */
    status = dot11fGetPackedTDLSDisRspSize( pMac, &tdlsDisRsp, &nPayload);
    if ( DOT11F_FAILED( status ) )
    {
        limLog(pMac, LOGE,
               FL("Failed to calculate the packed size for a Discovery Response (0x%08x)."),
               status);
        /* We'll fall back on the worst case scenario: */
        nPayload = sizeof( tDot11fProbeRequest );
    }
    else if ( DOT11F_WARNED( status ) )
    {
        limLog(pMac, LOGW,
               FL("There were warnings while calculating the packed size for a Discovery Response (0x%08x)."),
               status);
    }

    /*
     * This frame is going out from PE as data frames with special ethertype
     * 89-0d.
     * 8 bytes of RFC 1042 header
     */ 


    nBytes = nPayload + sizeof( tSirMacMgmtHdr ) + addIeLen;

    /* Ok-- try to allocate memory from MGMT PKT pool */

    halstatus = palPktAlloc( pMac->hHdd, HAL_TXRX_FRM_802_11_MGMT,
                             ( tANI_U16 )nBytes, ( void** ) &pFrame,
                             ( void** ) &pPacket );
    if ( ! HAL_STATUS_SUCCESS ( halstatus ) )
    {
        limLog(pMac, LOGE,
               FL("Failed to allocate %d bytes for a TDLS Discovery Response."),
               nBytes);
        return eSIR_MEM_ALLOC_FAILED;
    }

    /* zero out the memory */
    vos_mem_set( pFrame, nBytes, 0 );

    /* 
     * IE formation, memory allocation is completed, Now form TDLS discovery
     * response frame
     */

    /* Make public Action Frame */

#if 0
    limPreparesActionFrameHdr(pMac, pFrame, SIR_MAC_MGMT_FRAME,
                                          SIR_MAC_MGMT_ACTION, 
                                            LINK_IDEN_ADDR_OFFSET(tdlsDisRsp)) ;
#endif
    limPopulateMacHeader( pMac, pFrame, SIR_MAC_MGMT_FRAME,
              SIR_MAC_MGMT_ACTION, peerMac, psessionEntry->selfMacAddr);

    {
        tpSirMacMgmtHdr     pMacHdr;
        pMacHdr = ( tpSirMacMgmtHdr ) pFrame;
        pMacHdr->fc.toDS    = ANI_TXDIR_IBSS;
        pMacHdr->fc.powerMgmt = 0 ;
        sirCopyMacAddr(pMacHdr->bssId,psessionEntry->bssId);
    }

#ifdef FEATURE_WLAN_TDLS_NEGATIVE
    if(pMac->lim.gLimTdlsNegativeBehavior & LIM_TDLS_NEGATIVE_WRONG_BSSID_IN_DSCV_RSP)
    {
        tdlsDisRsp.LinkIdentifier.bssid[4] = 0xde;
        tdlsDisRsp.LinkIdentifier.bssid[5] = 0xad; 
        VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_ERROR, 
        ("TDLS negative running: wrong BSSID " MAC_ADDRESS_STR " in TDLS Discovery Rsp"),
         MAC_ADDR_ARRAY(tdlsDisRsp.LinkIdentifier.bssid));
    }
#endif
    status = dot11fPackTDLSDisRsp( pMac, &tdlsDisRsp, pFrame + 
                                              sizeof( tSirMacMgmtHdr ),
                                                  nPayload, &nPayload );

    if ( DOT11F_FAILED( status ) )
    {
        limLog( pMac, LOGE,
                FL("Failed to pack a TDLS Discovery Response (0x%08x)."),
                status);
        palPktFree( pMac->hHdd, HAL_TXRX_FRM_802_11_MGMT, 
                                   ( void* ) pFrame, ( void* ) pPacket );
        return eSIR_FAILURE;
    }
    else if ( DOT11F_WARNED( status ) )
    {
        limLog( pMac, LOGW,
                FL("There were warnings while packing TDLS Discovery Request (0x%08x)."),
                status);
    }

#if 0
    if(pMac->hal.pCBackFnTxComp == NULL) 
    {
        pMac->hal.pCBackFnTxComp = (tpCBackFnTxComp)limTdlsDisRspTxComplete;

        if(TX_SUCCESS != tx_timer_activate(&pMac->hal.txCompTimer)) 
        {
            status = eHAL_STATUS_FAILURE;
            return status;
                
        }
    }
#endif
    if (0 != addIeLen)
    {
        limLog(pMac, LOG1, FL("Copy Additional Ie Len = %d"), addIeLen);
        vos_mem_copy(pFrame + sizeof(tSirMacMgmtHdr) + nPayload, addIe,
                                                              addIeLen);
    }
    limLog(pMac, LOG1,
           FL("[TDLS] action %d (%s) -DIRECT-> OTA peer="MAC_ADDRESS_STR),
           SIR_MAC_TDLS_DIS_RSP,
           limTraceTdlsActionString(SIR_MAC_TDLS_DIS_RSP),
           MAC_ADDR_ARRAY(peerMac));

    /*
     * Transmit Discovery response and watch if this is delivered to
     * peer STA.
     */
    halstatus = halTxFrameWithTxComplete( pMac, pPacket, ( tANI_U16 ) nBytes,
                            HAL_TXRX_FRM_802_11_DATA,
                            ANI_TXDIR_IBSS,
                            0,
                            limTxComplete, pFrame, 
                            limMgmtTXComplete,
                            HAL_USE_SELF_STA_REQUESTED_MASK,
                            pMac->lim.txBdToken++);
    if ( ! HAL_STATUS_SUCCESS ( halstatus ) )
    {
        pMac->lim.mgmtFrameSessionId = 0xff;
        limLog(pMac, LOGE, FL("could not send TDLS Discovery Response frame!"));
        return eSIR_FAILURE;
    }
    pMac->lim.mgmtFrameSessionId = psessionEntry->smeSessionId;

    return eSIR_SUCCESS;

}

/*
 * This static function is currently used by limSendTdlsLinkSetupReqFrame and
 * limSendTdlsSetupRspFrame to populate the AID if device is 11ac capable.
 */
static void PopulateDotfTdlsVhtAID(tpAniSirGlobal pMac, uint32 selfDot11Mode,
                                   tSirMacAddr peerMac, tDot11fIEAID *Aid,
                                   tpPESession psessionEntry)
{
    if (((psessionEntry->currentOperChannel <= SIR_11B_CHANNEL_END) &&
          pMac->roam.configParam.enableVhtFor24GHz) ||
         (psessionEntry->currentOperChannel >= SIR_11B_CHANNEL_END))
    {
        if (IS_DOT11_MODE_VHT(selfDot11Mode) &&
            IS_FEATURE_SUPPORTED_BY_FW(DOT11AC))
        {

            tANI_U16 aid;
            tpDphHashNode       pStaDs;

            pStaDs = dphLookupHashEntry(pMac, peerMac, &aid, &psessionEntry->dph.dphHashTable);
            if (NULL != pStaDs)
            {
                 Aid->present = 1;
                 Aid->assocId = aid | LIM_AID_MASK; // set bit 14 and 15 1's
            }
            else
            {
                Aid->present = 0;
                limLog(pMac, LOGE, FL("pStaDs is NULL for " MAC_ADDRESS_STR),
                                   MAC_ADDR_ARRAY(peerMac));
            }
        }
    }
    else
    {
        Aid->present = 0;
        limLog(pMac, LOGW, FL("Vht not enable from ini for 2.4GHz."));
    }
}

/*
 * TDLS setup Request frame on AP link
 */

tSirRetStatus limSendTdlsLinkSetupReqFrame(tpAniSirGlobal pMac,
            tSirMacAddr peerMac, tANI_U8 dialog, tpPESession psessionEntry,
            tANI_U8 *addIe, tANI_U16 addIeLen)
{
    tDot11fTDLSSetupReq    tdlsSetupReq ;
    tANI_U16            caps = 0 ;
    tANI_U32            status = 0 ;
    tANI_U32            nPayload = 0 ;
    tANI_U32            nBytes = 0 ;
    tANI_U32            header_offset = 0 ;
    tANI_U8            *pFrame;
    void               *pPacket;
    eHalStatus          halstatus;
    uint32              selfDot11Mode;
    tpSirMacCapabilityInfo pCapInfo;
//  Placeholder to support different channel bonding mode of TDLS than AP.
//  Today, WNI_CFG_CHANNEL_BONDING_MODE will be overwritten when connecting to AP
//  To support this feature, we need to introduce WNI_CFG_TDLS_CHANNEL_BONDING_MODE
//  As of now, we hardcoded to max channel bonding of dot11Mode (i.e HT80 for 11ac/HT40 for 11n)
//  uint32 tdlsChannelBondingMode;

    /*
     * The scheme here is to fill out a 'tDot11fProbeRequest' structure
     * and then hand it off to 'dot11fPackProbeRequest' (for
     * serialization).  We start by zero-initializing the structure:
     */
    vos_mem_set(( tANI_U8* )&tdlsSetupReq, sizeof( tDot11fTDLSSetupReq ), 0);
    tdlsSetupReq.Category.category = SIR_MAC_ACTION_TDLS ;
    tdlsSetupReq.Action.action     = SIR_MAC_TDLS_SETUP_REQ ;
    tdlsSetupReq.DialogToken.token = dialog ;


    PopulateDot11fLinkIden( pMac, psessionEntry, &tdlsSetupReq.LinkIdentifier,
                                                    peerMac, TDLS_INITIATOR) ;

    if (cfgGetCapabilityInfo(pMac, &caps, psessionEntry) != eSIR_SUCCESS)
    {
        /*
         * Could not get Capabilities value
         * from CFG. Log error.
         */
         limLog(pMac, LOGE, FL("could not retrieve Capabilities value"));
    }

    pCapInfo = (tpSirMacCapabilityInfo) &caps;
    /* Export QOS capability  */
    pCapInfo->qos = 1;

    swapBitField16(caps, ( tANI_U16* )&tdlsSetupReq.Capabilities );

    limLog(pMac, LOG1, FL("Sending operating channel %d and dotl11mode %d\n"),
           psessionEntry->currentOperChannel,
           psessionEntry->dot11mode);

    /* populate supported rate and ext supported rate IE */
    PopulateDot11fRatesTdls(pMac, &tdlsSetupReq.SuppRates,
                               &tdlsSetupReq.ExtSuppRates,
                               psessionEntry->currentOperChannel);

    /* Populate extended capability IE */
    PopulateDot11fTdlsExtCapability( pMac, &tdlsSetupReq.ExtCap );

    if ( 1 == pMac->lim.gLimTDLSWmmMode )
    {
        tANI_U32  val = 0;

        /* include WMM IE */
        tdlsSetupReq.WMMInfoStation.version = SIR_MAC_OUI_VERSION_1;
        tdlsSetupReq.WMMInfoStation.acvo_uapsd =
                     (pMac->lim.gLimTDLSUapsdMask & 0x01);
        tdlsSetupReq.WMMInfoStation.acvi_uapsd =
                     ((pMac->lim.gLimTDLSUapsdMask & 0x02) >> 1);
        tdlsSetupReq.WMMInfoStation.acbk_uapsd =
                     ((pMac->lim.gLimTDLSUapsdMask & 0x04) >> 2);
        tdlsSetupReq.WMMInfoStation.acbe_uapsd =
                     ((pMac->lim.gLimTDLSUapsdMask & 0x08) >> 3);

        if(wlan_cfgGetInt(pMac, WNI_CFG_MAX_SP_LENGTH, &val) != eSIR_SUCCESS)
           limLog(pMac, LOGE, FL("could not retrieve Max SP Length"));

        tdlsSetupReq.WMMInfoStation.max_sp_length = (tANI_U8)val;
        tdlsSetupReq.WMMInfoStation.present = 1;
    }
    else
    {
        /*
         * TODO: we need to see if we have to support conditions where we have
         * EDCA parameter info element is needed a) if we need different QOS
         * parameters for off channel operations or QOS is not supported on
         * AP link and we wanted to QOS on direct link.
         */
        /* Populate QOS info, needed for Peer U-APSD session */
        /* TODO: Now hardcoded, because PopulateDot11fQOSCapsStation() depends on AP's capability, and
         TDLS doesn't want to depend on AP's capability */
        limLog(pMac, LOG1, FL("populate QOS IE in Setup Request Frame"));
        tdlsSetupReq.QOSCapsStation.present = 1;
        tdlsSetupReq.QOSCapsStation.max_sp_length = 0;
        tdlsSetupReq.QOSCapsStation.qack = 0;
        tdlsSetupReq.QOSCapsStation.acbe_uapsd = ((pMac->lim.gLimTDLSUapsdMask & 0x08) >> 3);
        tdlsSetupReq.QOSCapsStation.acbk_uapsd = ((pMac->lim.gLimTDLSUapsdMask & 0x04) >> 2);
        tdlsSetupReq.QOSCapsStation.acvi_uapsd = ((pMac->lim.gLimTDLSUapsdMask & 0x02) >> 1);
        tdlsSetupReq.QOSCapsStation.acvo_uapsd = (pMac->lim.gLimTDLSUapsdMask & 0x01);
    }

    /*
     * we will always try to init TDLS link with 11n capabilities
     * let TDLS setup response to come, and we will set our caps based
     * of peer caps
     */

    wlan_cfgGetInt(pMac,WNI_CFG_DOT11_MODE,&selfDot11Mode);

    /* Populate HT/VHT Capabilities */
    PopulateDot11fTdlsHtVhtCap( pMac, selfDot11Mode, &tdlsSetupReq.HTCaps,
                               &tdlsSetupReq.VHTCaps, psessionEntry );

    /* Populate AID */
    PopulateDotfTdlsVhtAID( pMac, selfDot11Mode, peerMac,
                            &tdlsSetupReq.AID, psessionEntry );

    if ( 1 == pMac->lim.gLimTDLSOffChannelEnabled )
        PopulateDot11fTdlsOffchannelParams( pMac, psessionEntry,
                                            &tdlsSetupReq.SuppChannels,
                                            &tdlsSetupReq.SuppOperatingClasses);

    if (TRUE == pMac->lim.EnableTdls2040BSSCoexIE)
    {
        if ( 1 == pMac->lim.gLimTDLSOffChannelEnabled &&
            ( pMac->roam.configParam.bandCapability != eCSR_BAND_24))
        {
            tdlsSetupReq.HT2040BSSCoexistence.present = 1;
            tdlsSetupReq.HT2040BSSCoexistence.infoRequest = 1;
        }
    }

    /*
     * now we pack it.  First, how much space are we going to need?
     */
    status = dot11fGetPackedTDLSSetupReqSize( pMac, &tdlsSetupReq,
                                                              &nPayload);
    if ( DOT11F_FAILED( status ) )
    {
        limLog(pMac, LOGE,
               FL("Failed to calculate the packed size for a Setup Request (0x%08x)."),
               status);
        /* We'll fall back on the worst case scenario: */
        nPayload = sizeof( tDot11fProbeRequest );
    }
    else if ( DOT11F_WARNED( status ) )
    {
        limLog(pMac, LOGW,
               FL("There were warnings while calculating the packed size for a Setup Request (0x%08x)."),
               status);
    }


    /*
     * This frame is going out from PE as data frames with special ethertype
     * 89-0d.
     * 8 bytes of RFC 1042 header
     */


    nBytes = nPayload + ((IS_QOS_ENABLED(psessionEntry))
                              ? sizeof(tSirMacDataHdr3a) : sizeof(tSirMacMgmtHdr))
                      + sizeof( eth_890d_header )
                      + PAYLOAD_TYPE_TDLS_SIZE
                      + addIeLen;

    /* Ok-- try to allocate memory from MGMT PKT pool */

    halstatus = palPktAlloc( pMac->hHdd, HAL_TXRX_FRM_802_11_MGMT,
                             ( tANI_U16 )nBytes, ( void** ) &pFrame,
                             ( void** ) &pPacket );
    if ( ! HAL_STATUS_SUCCESS ( halstatus ) )
    {
        limLog(pMac, LOGE,
               FL("Failed to allocate %d bytes for a TDLS Setup Request."),
               nBytes);
        return eSIR_MEM_ALLOC_FAILED;
    }

    /* zero out the memory */
    vos_mem_set( pFrame, nBytes, 0);

    /*
     * IE formation, memory allocation is completed, Now form TDLS discovery
     * request frame
     */

    /* fill out the buffer descriptor */

    header_offset = limPrepareTdlsFrameHeader(pMac, pFrame,
                          LINK_IDEN_ADDR_OFFSET(tdlsSetupReq),
                          TDLS_LINK_AP, TDLS_INITIATOR,
                          TID_AC_VI, psessionEntry) ;

#ifdef FEATURE_WLAN_TDLS_NEGATIVE
    if(pMac->lim.gLimTdlsNegativeBehavior & LIM_TDLS_NEGATIVE_WRONG_BSSID_IN_SETUP_REQ)
    {
        tdlsSetupReq.LinkIdentifier.bssid[4] = 0xde;
        tdlsSetupReq.LinkIdentifier.bssid[5] = 0xad;
        VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_ERROR,
        ("TDLS negative running: wrong BSSID " MAC_ADDRESS_STR " in TDLS Setup Req"),
         MAC_ADDR_ARRAY(tdlsSetupReq.LinkIdentifier.bssid));
    }
#endif
    limLog( pMac, LOGW, FL("SupportedChnlWidth %x rxMCSMap %x rxMCSMap %x txSupDataRate %x"),
            tdlsSetupReq.VHTCaps.supportedChannelWidthSet,
            tdlsSetupReq.VHTCaps.rxMCSMap,
            tdlsSetupReq.VHTCaps.txMCSMap,
            tdlsSetupReq.VHTCaps.txSupDataRate);

    status = dot11fPackTDLSSetupReq( pMac, &tdlsSetupReq, pFrame
                               + header_offset, nPayload, &nPayload );

    if ( DOT11F_FAILED( status ) )
    {
        limLog(pMac, LOGE,
               FL("Failed to pack a TDLS Setup Request (0x%08x)."),
                   status);
        palPktFree( pMac->hHdd, HAL_TXRX_FRM_802_11_MGMT, 
                                   ( void* ) pFrame, ( void* ) pPacket );
        return eSIR_FAILURE;
    }
    else if ( DOT11F_WARNED( status ) )
    {
        limLog(pMac, LOGW,
               FL("There were warnings while packing TDLS Setup Request (0x%08x)."),
               status);
    }

    //Copy the additional IE.
    //TODO : addIe is added at the end of the frame. This means it doesnt
    //follow the order. This should be ok, but we should consider changing this
    //if there is any IOT issue.
    if( addIeLen != 0 )
    {
        limLog(pMac, LOG1, FL("Copy Additional Ie Len = %d"),
                           addIeLen);
        vos_mem_copy( pFrame + header_offset + nPayload, addIe, addIeLen );
    }

    limLog(pMac, LOG1, FL("[TDLS] action %d (%s) -AP-> OTA peer="MAC_ADDRESS_STR),
                       SIR_MAC_TDLS_SETUP_REQ,
                       limTraceTdlsActionString(SIR_MAC_TDLS_SETUP_REQ),
                       MAC_ADDR_ARRAY(peerMac));

    halstatus = halTxFrameWithTxComplete( pMac, pPacket, ( tANI_U16 ) nBytes,
                            HAL_TXRX_FRM_802_11_DATA,
                            ANI_TXDIR_TODS,
                            TID_AC_VI,
                            limTxComplete, pFrame,
                            limMgmtTXComplete,
                            HAL_USE_BD_RATE2_FOR_MANAGEMENT_FRAME |
                                HAL_USE_PEER_STA_REQUESTED_MASK,
                            pMac->lim.txBdToken++);

    if ( ! HAL_STATUS_SUCCESS ( halstatus ) )
    {
        pMac->lim.mgmtFrameSessionId = 0xff;
        limLog(pMac, LOGE, FL("could not send TDLS Setup Request frame!"));
        return eSIR_FAILURE;
    }
    pMac->lim.mgmtFrameSessionId = psessionEntry->smeSessionId;

    return eSIR_SUCCESS;

}
/*
 * Send TDLS Teardown frame on Direct link or AP link, depends on reason code.
 */

tSirRetStatus limSendTdlsTeardownFrame(tpAniSirGlobal pMac,
            tSirMacAddr peerMac, tANI_U16 reason, tANI_U8 responder, tpPESession psessionEntry,
            tANI_U8 *addIe, tANI_U16 addIeLen)
{
    tDot11fTDLSTeardown teardown ;
    tANI_U32            status = 0 ;
    tANI_U32            nPayload = 0 ;
    tANI_U32            nBytes = 0 ;
    tANI_U32            header_offset = 0 ;
    tANI_U8            *pFrame;
    void               *pPacket;
    eHalStatus          halstatus;
#ifndef NO_PAD_TDLS_MIN_8023_SIZE
    tANI_U32            padLen = 0;
#endif
    tpDphHashNode       pStaDs = NULL;
    tANI_U16            aid = 0;
    tANI_U8             qosMode = 0;
    tANI_U8             tdlsLinkType = 0;

    /*
     * The scheme here is to fill out a 'tDot11fProbeRequest' structure
     * and then hand it off to 'dot11fPackProbeRequest' (for
     * serialization).  We start by zero-initializing the structure:
     */
    vos_mem_set( ( tANI_U8* )&teardown, sizeof( tDot11fTDLSTeardown ), 0 );
    teardown.Category.category = SIR_MAC_ACTION_TDLS ;
    teardown.Action.action     = SIR_MAC_TDLS_TEARDOWN ;
    teardown.Reason.code       = reason ;

    PopulateDot11fLinkIden( pMac, psessionEntry, &teardown.LinkIdentifier,
                                                peerMac, (responder == TRUE) ? TDLS_RESPONDER : TDLS_INITIATOR) ;
    /*
     * now we pack it.  First, how much space are we going to need?
     */
    status = dot11fGetPackedTDLSTeardownSize( pMac, &teardown, &nPayload);
    if ( DOT11F_FAILED( status ) )
    {
        limLog(pMac, LOGE,
               FL("Failed to calculate the packed size for Teardown frame (0x%08x)."),
               status);
        /* We'll fall back on the worst case scenario: */
        nPayload = sizeof( tDot11fProbeRequest );
    }
    else if ( DOT11F_WARNED( status ) )
    {
        limLog(pMac, LOGW,
               FL("There were warnings while calculating the packed size for Teardown frame (0x%08x)."),
               status);
    }
    /*
     * This frame is going out from PE as data frames with special ethertype
     * 89-0d.
     * 8 bytes of RFC 1042 header
     */
    pStaDs = dphLookupHashEntry(pMac, peerMac, &aid,
                                     &psessionEntry->dph.dphHashTable);
    if (pStaDs)
    {
        qosMode = pStaDs->qosMode;
    }
    tdlsLinkType = (reason == eSIR_MAC_TDLS_TEARDOWN_PEER_UNREACHABLE)
                              ? TDLS_LINK_AP : TDLS_LINK_DIRECT;
    nBytes = nPayload + (((IS_QOS_ENABLED(psessionEntry) &&
                          (tdlsLinkType == TDLS_LINK_AP)) ||
                          ((tdlsLinkType == TDLS_LINK_DIRECT) && qosMode))
                              ? sizeof(tSirMacDataHdr3a) : sizeof(tSirMacMgmtHdr))
                      + sizeof( eth_890d_header )
                      + PAYLOAD_TYPE_TDLS_SIZE
                      + addIeLen;

#ifndef NO_PAD_TDLS_MIN_8023_SIZE
    /* IOT issue with some AP : some AP doesn't like the data packet size < minimum 802.3 frame length (64)
       Hence AP itself padding some bytes, which caused teardown packet is dropped at
       receiver side. To avoid such IOT issue, we added some extra bytes to meet data frame size >= 64
     */
    if (nPayload + PAYLOAD_TYPE_TDLS_SIZE < MIN_IEEE_8023_SIZE)
    {
        padLen = MIN_IEEE_8023_SIZE - (nPayload + PAYLOAD_TYPE_TDLS_SIZE ) ;

        /* if padLen is less than minimum vendorSpecific (5), pad up to 5 */
        if (padLen < MIN_VENDOR_SPECIFIC_IE_SIZE)
            padLen = MIN_VENDOR_SPECIFIC_IE_SIZE;

        nBytes += padLen;
    }
#endif

    /* Ok-- try to allocate memory from MGMT PKT pool */

    halstatus = palPktAlloc( pMac->hHdd, HAL_TXRX_FRM_802_11_MGMT,
                             ( tANI_U16 )nBytes, ( void** ) &pFrame,
                             ( void** ) &pPacket );
    if ( ! HAL_STATUS_SUCCESS ( halstatus ) )
    {
        limLog(pMac, LOGE,
               FL("Failed to allocate %d bytes for a TDLS Teardown Frame."),
               nBytes);
        return eSIR_MEM_ALLOC_FAILED;
    }

    /* zero out the memory */
    vos_mem_set( pFrame, nBytes, 0 );

    /*
     * IE formation, memory allocation is completed, Now form TDLS discovery
     * request frame
     */
    limLog(pMac, LOGE, FL("Reason of TDLS Teardown: %d"), reason);
    /* fill out the buffer descriptor */

    header_offset = limPrepareTdlsFrameHeader(pMac, pFrame,
                     LINK_IDEN_ADDR_OFFSET(teardown),
                          (reason == eSIR_MAC_TDLS_TEARDOWN_PEER_UNREACHABLE)
                              ? TDLS_LINK_AP : TDLS_LINK_DIRECT,
                              (responder == TRUE) ? TDLS_RESPONDER : TDLS_INITIATOR,
                              TID_AC_VI, psessionEntry) ;

    status = dot11fPackTDLSTeardown( pMac, &teardown, pFrame
                               + header_offset, nPayload, &nPayload );

    if ( DOT11F_FAILED( status ) )
    {
        limLog( pMac, LOGE, FL("Failed to pack a TDLS Teardown req (0x%08x)."),
                status);
        palPktFree( pMac->hHdd, HAL_TXRX_FRM_802_11_MGMT,
                                   ( void* ) pFrame, ( void* ) pPacket );
        return eSIR_FAILURE;
    }
    else if ( DOT11F_WARNED( status ) )
    {
        limLog(pMac, LOGW, FL("There were warnings while packing TDLS Teardown frame (0x%08x)."),
               status);
    }
#if 0
    if(pMac->hal.pCBackFnTxComp == NULL)
    {
        pMac->hal.pCBackFnTxComp = (tpCBackFnTxComp)limTdlsTeardownTxComplete;
        if(TX_SUCCESS != tx_timer_activate(&pMac->hal.txCompTimer))
        {
            status = eHAL_STATUS_FAILURE;
            return status;
                
        }
    }
    else
    {
        VOS_ASSERT(0) ;
        return status ;
    }
#endif

    if( addIeLen != 0 )
    {
        limLog(pMac, LOG1, FL("Copy Additional Ie Len = %d"), addIeLen);
        vos_mem_copy( pFrame + header_offset + nPayload, addIe, addIeLen );
    }

#ifndef NO_PAD_TDLS_MIN_8023_SIZE
    if (padLen != 0)
    {
        /* QCOM VENDOR OUI = { 0x00, 0xA0, 0xC6, type = 0x0000 }; */
        tANI_U8 *padVendorSpecific = pFrame + header_offset + nPayload + addIeLen;
        /* make QCOM_VENDOR_OUI, and type = 0x0000, and all the payload to be zero */
        padVendorSpecific[0] = 221;
        padVendorSpecific[1] = padLen - 2;
        padVendorSpecific[2] = 0x00;
        padVendorSpecific[3] = 0xA0;
        padVendorSpecific[4] = 0xC6;

        limLog(pMac, LOG1, FL("Padding Vendor Specific Ie Len = %d"), padLen);

        /* padding zero if more than 5 bytes are required */
        if (padLen > MIN_VENDOR_SPECIFIC_IE_SIZE)
            vos_mem_set( pFrame + header_offset + nPayload + addIeLen + MIN_VENDOR_SPECIFIC_IE_SIZE,
                         padLen - MIN_VENDOR_SPECIFIC_IE_SIZE, 0);
    }
#endif
    limLog(pMac, LOG1, FL("[TDLS] action %d (%s) -%s-> OTA peer="MAC_ADDRESS_STR),
                       SIR_MAC_TDLS_TEARDOWN,
                       limTraceTdlsActionString(SIR_MAC_TDLS_TEARDOWN),
                       ((reason == eSIR_MAC_TDLS_TEARDOWN_PEER_UNREACHABLE) ?
                       "AP": "DIRECT"),
                       MAC_ADDR_ARRAY(peerMac));

    halstatus = halTxFrameWithTxComplete( pMac, pPacket, ( tANI_U16 ) nBytes,
                            HAL_TXRX_FRM_802_11_DATA,
                            ANI_TXDIR_TODS,
                            TID_AC_VI,
                            limTxComplete, pFrame,
                            limMgmtTXComplete,
                            HAL_USE_BD_RATE2_FOR_MANAGEMENT_FRAME |
                                HAL_USE_PEER_STA_REQUESTED_MASK,
                            pMac->lim.txBdToken++);
    if ( ! HAL_STATUS_SUCCESS ( halstatus ) )
    {
        pMac->lim.mgmtFrameSessionId = 0xff;
        limLog(pMac, LOGE, FL("could not send TDLS Teardown frame"));
        return eSIR_FAILURE;

    }
    pMac->lim.mgmtFrameSessionId = psessionEntry->smeSessionId;
    return eSIR_SUCCESS;

}

/*
 * Send Setup RSP frame on AP link.
 */
static tSirRetStatus limSendTdlsSetupRspFrame(tpAniSirGlobal pMac,
                    tSirMacAddr peerMac, tANI_U8 dialog, tpPESession psessionEntry,
                    etdlsLinkSetupStatus setupStatus, tANI_U8 *addIe, tANI_U16 addIeLen )
{
    tDot11fTDLSSetupRsp  tdlsSetupRsp ;
    tANI_U32            status = 0 ;
    tANI_U16            caps = 0 ;
    tANI_U32            nPayload = 0 ;
    tANI_U32            header_offset = 0 ;
    tANI_U32            nBytes = 0 ;
    tANI_U8            *pFrame;
    void               *pPacket;
    eHalStatus          halstatus;
    uint32             selfDot11Mode;
    tpSirMacCapabilityInfo pCapInfo;
//  Placeholder to support different channel bonding mode of TDLS than AP.
//  Today, WNI_CFG_CHANNEL_BONDING_MODE will be overwritten when connecting to AP
//  To support this feature, we need to introduce WNI_CFG_TDLS_CHANNEL_BONDING_MODE
//  As of now, we hardcoded to max channel bonding of dot11Mode (i.e HT80 for 11ac/HT40 for 11n)
//  uint32 tdlsChannelBondingMode;

    /*
     * The scheme here is to fill out a 'tDot11fProbeRequest' structure
     * and then hand it off to 'dot11fPackProbeRequest' (for
     * serialization).  We start by zero-initializing the structure:
     */
    vos_mem_set( ( tANI_U8* )&tdlsSetupRsp, sizeof( tDot11fTDLSSetupRsp ),0 );

    /*
     * setup Fixed fields,
     */
    tdlsSetupRsp.Category.category = SIR_MAC_ACTION_TDLS;
    tdlsSetupRsp.Action.action     = SIR_MAC_TDLS_SETUP_RSP ;
    tdlsSetupRsp.DialogToken.token = dialog;

    PopulateDot11fLinkIden( pMac, psessionEntry, &tdlsSetupRsp.LinkIdentifier,
                 peerMac, TDLS_RESPONDER) ;

    if (cfgGetCapabilityInfo(pMac, &caps, psessionEntry) != eSIR_SUCCESS)
    {
        /*
         * Could not get Capabilities value
         * from CFG. Log error.
         */
         limLog(pMac, LOGE, FL("could not retrieve Capabilities value"));
    }

    pCapInfo = (tpSirMacCapabilityInfo) &caps;
    /* Export QoS capability */
    pCapInfo->qos = 1;

    swapBitField16(caps, ( tANI_U16* )&tdlsSetupRsp.Capabilities );

    /* populate supported rate and ext supported rate IE */
    PopulateDot11fRatesTdls(pMac, &tdlsSetupRsp.SuppRates,
                                &tdlsSetupRsp.ExtSuppRates,
                                psessionEntry->currentOperChannel);

    /* Populate extended capability IE */
    PopulateDot11fTdlsExtCapability( pMac, &tdlsSetupRsp.ExtCap );

    if ( 1 == pMac->lim.gLimTDLSWmmMode )
    {
        tANI_U32  val = 0;

        /* include WMM IE */
        tdlsSetupRsp.WMMInfoStation.version = SIR_MAC_OUI_VERSION_1;
        tdlsSetupRsp.WMMInfoStation.acvo_uapsd =
                     (pMac->lim.gLimTDLSUapsdMask & 0x01);
        tdlsSetupRsp.WMMInfoStation.acvi_uapsd =
                     ((pMac->lim.gLimTDLSUapsdMask & 0x02) >> 1);
        tdlsSetupRsp.WMMInfoStation.acbk_uapsd =
                     ((pMac->lim.gLimTDLSUapsdMask & 0x04) >> 2);
        tdlsSetupRsp.WMMInfoStation.acbe_uapsd =
                     ((pMac->lim.gLimTDLSUapsdMask & 0x08) >> 3);

        if(wlan_cfgGetInt(pMac, WNI_CFG_MAX_SP_LENGTH, &val) != eSIR_SUCCESS)
           limLog(pMac, LOGE, FL("could not retrieve Max SP Length"));

        tdlsSetupRsp.WMMInfoStation.max_sp_length = (tANI_U8)val;
        tdlsSetupRsp.WMMInfoStation.present = 1;
    }
    else
    {
        /*
         * TODO: we need to see if we have to support conditions where we have
         * EDCA parameter info element is needed a) if we need different QOS
         * parameters for off channel operations or QOS is not supported on
         * AP link and we wanted to QOS on direct link.
         */
        /* Populate QOS info, needed for Peer U-APSD session */
        /* TODO: Now hardcoded, because PopulateDot11fQOSCapsStation() depends on AP's capability, and
         TDLS doesn't want to depend on AP's capability */
        limLog(pMac, LOG1, FL("populate QOS IE in Setup Response frame"));
        tdlsSetupRsp.QOSCapsStation.present = 1;
        tdlsSetupRsp.QOSCapsStation.max_sp_length = 0;
        tdlsSetupRsp.QOSCapsStation.qack = 0;
        tdlsSetupRsp.QOSCapsStation.acbe_uapsd = ((pMac->lim.gLimTDLSUapsdMask & 0x08) >> 3);
        tdlsSetupRsp.QOSCapsStation.acbk_uapsd = ((pMac->lim.gLimTDLSUapsdMask & 0x04) >> 2);
        tdlsSetupRsp.QOSCapsStation.acvi_uapsd = ((pMac->lim.gLimTDLSUapsdMask & 0x02) >> 1);
        tdlsSetupRsp.QOSCapsStation.acvo_uapsd = (pMac->lim.gLimTDLSUapsdMask & 0x01);
    }

    wlan_cfgGetInt(pMac,WNI_CFG_DOT11_MODE,&selfDot11Mode);

    /* Populate HT/VHT Capabilities */
    PopulateDot11fTdlsHtVhtCap( pMac, selfDot11Mode, &tdlsSetupRsp.HTCaps,
                                &tdlsSetupRsp.VHTCaps, psessionEntry );

    /* Populate AID */
    PopulateDotfTdlsVhtAID( pMac, selfDot11Mode, peerMac,
                            &tdlsSetupRsp.AID, psessionEntry );

    if ( 1 == pMac->lim.gLimTDLSOffChannelEnabled )
        PopulateDot11fTdlsOffchannelParams( pMac, psessionEntry,
                                            &tdlsSetupRsp.SuppChannels,
                                            &tdlsSetupRsp.SuppOperatingClasses);

    tdlsSetupRsp.Status.status = setupStatus ;

    if (TRUE == pMac->lim.EnableTdls2040BSSCoexIE)
    {
        if ( 1 == pMac->lim.gLimTDLSOffChannelEnabled &&
            ( pMac->roam.configParam.bandCapability != eCSR_BAND_24))
        {
            tdlsSetupRsp.HT2040BSSCoexistence.present = 1;
            tdlsSetupRsp.HT2040BSSCoexistence.infoRequest = 1;
        }
    }
    /* 
     * now we pack it.  First, how much space are we going to need?
     */
    status = dot11fGetPackedTDLSSetupRspSize( pMac, &tdlsSetupRsp, 
                                                     &nPayload);
    if ( DOT11F_FAILED( status ) )
    {
        limLog(pMac, LOGE,
               FL("Failed to calculate the packed size for a Setup Response (0x%08x)."),
               status);
        /* We'll fall back on the worst case scenario: */
        nPayload = sizeof( tDot11fProbeRequest );
    }
    else if ( DOT11F_WARNED( status ) )
    {
        limLog(pMac, LOGW,
               FL("There were warnings while calculating the packed size for Setup Response (0x%08x)."),
               status);
    }

    /*
     * This frame is going out from PE as data frames with special ethertype
     * 89-0d.
     * 8 bytes of RFC 1042 header
     */ 


    nBytes = nPayload + ((IS_QOS_ENABLED(psessionEntry))
                              ? sizeof(tSirMacDataHdr3a) : sizeof(tSirMacMgmtHdr))
                      + sizeof( eth_890d_header )
                      + PAYLOAD_TYPE_TDLS_SIZE
                      + addIeLen;

    /* Ok-- try to allocate memory from MGMT PKT pool */

    halstatus = palPktAlloc( pMac->hHdd, HAL_TXRX_FRM_802_11_MGMT,
                             ( tANI_U16 )nBytes, ( void** ) &pFrame,
                             ( void** ) &pPacket );
    if ( ! HAL_STATUS_SUCCESS ( halstatus ) )
    {
        limLog(pMac, LOGE,
               FL("Failed to allocate %d bytes for a TDLS Setup Response."),
               nBytes);
        return eSIR_MEM_ALLOC_FAILED;
    }

    /* zero out the memory */
    vos_mem_set(  pFrame, nBytes, 0 );

    /* 
     * IE formation, memory allocation is completed, Now form TDLS discovery
     * request frame
     */

    /* fill out the buffer descriptor */

    header_offset = limPrepareTdlsFrameHeader(pMac, pFrame, 
                                 LINK_IDEN_ADDR_OFFSET(tdlsSetupRsp), 
                                       TDLS_LINK_AP, TDLS_RESPONDER,
                                       TID_AC_VI, psessionEntry) ;

#ifdef FEATURE_WLAN_TDLS_NEGATIVE
    if(pMac->lim.gLimTdlsNegativeBehavior & LIM_TDLS_NEGATIVE_WRONG_BSSID_IN_SETUP_RSP)
    {
        tdlsSetupRsp.LinkIdentifier.bssid[4] = 0xde;
        tdlsSetupRsp.LinkIdentifier.bssid[5] = 0xad; 
        VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_ERROR, 
        ("TDLS negative running: wrong BSSID " MAC_ADDRESS_STR " in TDLS Setup Rsp"),
         MAC_ADDR_ARRAY(tdlsSetupRsp.LinkIdentifier.bssid));
    }
#endif
    limLog(pMac, LOG1,
           FL("SupportedChnlWidth %x rxMCSMap %x rxMCSMap %x txSupDataRate %x"),
           tdlsSetupRsp.VHTCaps.supportedChannelWidthSet,
           tdlsSetupRsp.VHTCaps.rxMCSMap,
           tdlsSetupRsp.VHTCaps.txMCSMap,
           tdlsSetupRsp.VHTCaps.txSupDataRate);
    status = dot11fPackTDLSSetupRsp( pMac, &tdlsSetupRsp, pFrame 
                               + header_offset, nPayload, &nPayload );

    if ( DOT11F_FAILED( status ) )
    {
        limLog(pMac, LOGE, FL("Failed to pack a TDLS Setup Response (0x%08x)."),
               status);
        palPktFree( pMac->hHdd, HAL_TXRX_FRM_802_11_MGMT, 
                                   ( void* ) pFrame, ( void* ) pPacket );
        return eSIR_FAILURE;
    }
    else if ( DOT11F_WARNED( status ) )
    {
        limLog(pMac, LOGW,
               FL("There were warnings while packing TDLS Setup Response (0x%08x)."),
               status);
    }

    //Copy the additional IE. 
    //TODO : addIe is added at the end of the frame. This means it doesnt
    //follow the order. This should be ok, but we should consider changing this
    //if there is any IOT issue.
    if( addIeLen != 0 )
    {
       vos_mem_copy( pFrame + header_offset + nPayload, addIe, addIeLen );
    }

    limLog(pMac, LOG1,
           FL("[TDLS] action %d (%s) -AP-> OTA peer="MAC_ADDRESS_STR),
           SIR_MAC_TDLS_SETUP_RSP,
           limTraceTdlsActionString(SIR_MAC_TDLS_SETUP_RSP),
           MAC_ADDR_ARRAY(peerMac));

    halstatus = halTxFrameWithTxComplete( pMac, pPacket, ( tANI_U16 ) nBytes,
                            HAL_TXRX_FRM_802_11_DATA,
                            ANI_TXDIR_TODS,
                            //ANI_TXDIR_IBSS,
                            TID_AC_VI,
                            limTxComplete, pFrame,
                            limMgmtTXComplete,
                            HAL_USE_BD_RATE2_FOR_MANAGEMENT_FRAME |
                                HAL_USE_PEER_STA_REQUESTED_MASK,
                            pMac->lim.txBdToken++);
    if ( ! HAL_STATUS_SUCCESS ( halstatus ) )
    {
        pMac->lim.mgmtFrameSessionId = 0xff;
        limLog(pMac, LOGE, FL("could not send TDLS Setup Response"));
        return eSIR_FAILURE;
    }
    pMac->lim.mgmtFrameSessionId = psessionEntry->smeSessionId;

    return eSIR_SUCCESS;

}

/*
 * Send TDLS setup CNF frame on AP link
 */

tSirRetStatus limSendTdlsLinkSetupCnfFrame(tpAniSirGlobal pMac, tSirMacAddr peerMac,
                    tANI_U8 dialog, tANI_U32 peerCapability, tpPESession psessionEntry, tANI_U8* addIe, tANI_U16 addIeLen)
{
    tDot11fTDLSSetupCnf  tdlsSetupCnf ;
    tANI_U32            status = 0 ;
    tANI_U32            nPayload = 0 ;
    tANI_U32            nBytes = 0 ;
    tANI_U32            header_offset = 0 ;
    tANI_U8            *pFrame;
    void               *pPacket;
    eHalStatus          halstatus;
#ifndef NO_PAD_TDLS_MIN_8023_SIZE
    tANI_U32            padLen = 0;
#endif

    /* 
     * The scheme here is to fill out a 'tDot11fProbeRequest' structure
     * and then hand it off to 'dot11fPackProbeRequest' (for
     * serialization).  We start by zero-initializing the structure:
     */
    vos_mem_set( ( tANI_U8* )&tdlsSetupCnf, sizeof( tDot11fTDLSSetupCnf ), 0 );

    /*
     * setup Fixed fields,
     */
    tdlsSetupCnf.Category.category = SIR_MAC_ACTION_TDLS;
    tdlsSetupCnf.Action.action     = SIR_MAC_TDLS_SETUP_CNF ;
    tdlsSetupCnf.DialogToken.token = dialog ;

    PopulateDot11fLinkIden( pMac, psessionEntry, &tdlsSetupCnf.LinkIdentifier,
                      peerMac, TDLS_INITIATOR) ;

    /* 
     * TODO: we need to see if we have to support conditions where we have
     * EDCA parameter info element is needed a) if we need different QOS
     * parameters for off channel operations or QOS is not supported on 
     * AP link and we wanted to QOS on direct link.
     */

    /* Check self and peer WMM capable */
    if ((1 == pMac->lim.gLimTDLSWmmMode) && (CHECK_BIT(peerCapability, TDLS_PEER_WMM_CAP)))
    {
       limLog(pMac, LOG1, FL("populate WMM praram in Setup Confirm"));
       PopulateDot11fWMMParams(pMac, &tdlsSetupCnf.WMMParams, psessionEntry);
    }

     /* Check peer is VHT capable*/
    if (CHECK_BIT(peerCapability, TDLS_PEER_VHT_CAP))
    {
       PopulateDot11fVHTOperation( pMac, &tdlsSetupCnf.VHTOperation,
                                      psessionEntry->currentOperChannel);
       PopulateDot11fHTInfo( pMac, &tdlsSetupCnf.HTInfo, psessionEntry );
    }
    else if (CHECK_BIT(peerCapability, TDLS_PEER_HT_CAP)) /* Check peer is HT capable */
    {
       PopulateDot11fHTInfo( pMac, &tdlsSetupCnf.HTInfo, psessionEntry );
    }

    if (TRUE == pMac->lim.EnableTdls2040BSSCoexIE)
    {
        if ( 1 == pMac->lim.gLimTDLSOffChannelEnabled &&
            ( pMac->roam.configParam.bandCapability != eCSR_BAND_24))
        {
            tdlsSetupCnf.HT2040BSSCoexistence.present = 1;
            tdlsSetupCnf.HT2040BSSCoexistence.infoRequest = 1;
        }
    }

    /* 
     * now we pack it.  First, how much space are we going to need?
     */
    status = dot11fGetPackedTDLSSetupCnfSize( pMac, &tdlsSetupCnf, 
                                                     &nPayload);
    if ( DOT11F_FAILED( status ) )
    {
        limLog(pMac, LOGE,
               FL("Failed to calculate the packed size for Setup Confirm (0x%08x)."),
               status);
        /* We'll fall back on the worst case scenario: */
        nPayload = sizeof( tDot11fProbeRequest );
    }
    else if ( DOT11F_WARNED( status ) )
    {
        limLog(pMac, LOGW,
               FL("There were warnings while calculating the packed size for Setup Confirm (0x%08x)."),
               status);
    }

    /*
     * This frame is going out from PE as data frames with special ethertype
     * 89-0d.
     * 8 bytes of RFC 1042 header
     */ 


    nBytes = nPayload + ((IS_QOS_ENABLED(psessionEntry))
                              ? sizeof(tSirMacDataHdr3a) : sizeof(tSirMacMgmtHdr))
                      + sizeof( eth_890d_header )
                      + PAYLOAD_TYPE_TDLS_SIZE
                      + addIeLen;

#ifndef NO_PAD_TDLS_MIN_8023_SIZE
    /* IOT issue with some AP : some AP doesn't like the data packet size < minimum 802.3 frame length (64)
       Hence AP itself padding some bytes, which caused teardown packet is dropped at
       receiver side. To avoid such IOT issue, we added some extra bytes to meet data frame size >= 64
     */
    if (nPayload + PAYLOAD_TYPE_TDLS_SIZE < MIN_IEEE_8023_SIZE)
    {
        padLen = MIN_IEEE_8023_SIZE - (nPayload + PAYLOAD_TYPE_TDLS_SIZE ) ;

        /* if padLen is less than minimum vendorSpecific (5), pad up to 5 */
        if (padLen < MIN_VENDOR_SPECIFIC_IE_SIZE)
            padLen = MIN_VENDOR_SPECIFIC_IE_SIZE;

        nBytes += padLen;
    }
#endif


    /* Ok-- try to allocate memory from MGMT PKT pool */

    halstatus = palPktAlloc( pMac->hHdd, HAL_TXRX_FRM_802_11_MGMT,
                             ( tANI_U16 )nBytes, ( void** ) &pFrame,
                             ( void** ) &pPacket );
    if ( ! HAL_STATUS_SUCCESS ( halstatus ) )
    {
        limLog(pMac, LOGE,
               FL("Failed to allocate %d bytes for a TDLS Setup Confirm."),
               nBytes);
        return eSIR_MEM_ALLOC_FAILED;
    }

    /* zero out the memory */
    vos_mem_set( pFrame, nBytes, 0 );

    /* 
     * IE formation, memory allocation is completed, Now form TDLS discovery
     * request frame
     */

    /* fill out the buffer descriptor */

    header_offset = limPrepareTdlsFrameHeader(pMac, pFrame, 
                     LINK_IDEN_ADDR_OFFSET(tdlsSetupCnf), TDLS_LINK_AP, TDLS_INITIATOR,
                     TID_AC_VI, psessionEntry) ;

#ifdef FEATURE_WLAN_TDLS_NEGATIVE
    if(pMac->lim.gLimTdlsNegativeBehavior & LIM_TDLS_NEGATIVE_STATUS_37_IN_SETUP_CNF) {
        tdlsSetupCnf.StatusCode.statusCode = 37;
        VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_ERROR, 
        ("TDLS negative running: StatusCode = 37 in TDLS Setup Cnf"));
    }
#endif
    status = dot11fPackTDLSSetupCnf( pMac, &tdlsSetupCnf, pFrame 
                               + header_offset, nPayload, &nPayload );

    if ( DOT11F_FAILED( status ) )
    {
        limLog(pMac, LOGE,
               FL("Failed to pack a TDLS Setup Confirm (0x%08x)."),
               status);
        palPktFree( pMac->hHdd, HAL_TXRX_FRM_802_11_MGMT, 
                                   ( void* ) pFrame, ( void* ) pPacket );
        return eSIR_FAILURE;
    }
    else if ( DOT11F_WARNED( status ) )
    {
        limLog(pMac, LOGW,
               FL("There were warnings while packing TDLS Setup Confirm (0x%08x)."),
               status);
    }
#if 0
    if(pMac->hal.pCBackFnTxComp == NULL) 
    {
        pMac->hal.pCBackFnTxComp = (tpCBackFnTxComp)limTdlsSetupCnfTxComplete;
        if(TX_SUCCESS != tx_timer_activate(&pMac->hal.txCompTimer)) 
        {
            status = eHAL_STATUS_FAILURE;
            return status;
                
        }
    }
    else
    {
        VOS_ASSERT(0) ;
        return status ;
    }
#endif
    //Copy the additional IE. 
    //TODO : addIe is added at the end of the frame. This means it doesnt
    //follow the order. This should be ok, but we should consider changing this
    //if there is any IOT issue.
    if( addIeLen != 0 )
    {
       vos_mem_copy( pFrame + header_offset + nPayload, addIe, addIeLen );
    }

#ifndef NO_PAD_TDLS_MIN_8023_SIZE
    if (padLen != 0)
    {
        /* QCOM VENDOR OUI = { 0x00, 0xA0, 0xC6, type = 0x0000 }; */
        tANI_U8 *padVendorSpecific = pFrame + header_offset + nPayload + addIeLen;
        /* make QCOM_VENDOR_OUI, and type = 0x0000, and all the payload to be zero */
        padVendorSpecific[0] = 221;
        padVendorSpecific[1] = padLen - 2;
        padVendorSpecific[2] = 0x00;
        padVendorSpecific[3] = 0xA0;
        padVendorSpecific[4] = 0xC6;

        limLog(pMac, LOG1, FL("Padding Vendor Specific Ie Len = %d"), padLen);

        /* padding zero if more than 5 bytes are required */
        if (padLen > MIN_VENDOR_SPECIFIC_IE_SIZE)
            vos_mem_set( pFrame + header_offset + nPayload + addIeLen + MIN_VENDOR_SPECIFIC_IE_SIZE,
                         padLen - MIN_VENDOR_SPECIFIC_IE_SIZE, 0);
    }
#endif


    limLog(pMac, LOG1,
           FL("[TDLS] action %d (%s) -AP-> OTA peer="MAC_ADDRESS_STR),
           SIR_MAC_TDLS_SETUP_CNF,
           limTraceTdlsActionString(SIR_MAC_TDLS_SETUP_CNF),
           MAC_ADDR_ARRAY(peerMac));

    halstatus = halTxFrameWithTxComplete( pMac, pPacket, ( tANI_U16 ) nBytes,
                            HAL_TXRX_FRM_802_11_DATA,
                            ANI_TXDIR_TODS,
                            TID_AC_VI,
                            limTxComplete, pFrame, 
                            limMgmtTXComplete,
                            HAL_USE_BD_RATE2_FOR_MANAGEMENT_FRAME |
                                HAL_USE_PEER_STA_REQUESTED_MASK,
                            pMac->lim.txBdToken++);


    if ( ! HAL_STATUS_SUCCESS ( halstatus ) )
    {
        pMac->lim.mgmtFrameSessionId = 0xff;
        limLog(pMac, LOGE, FL("could not send TDLS Setup Confirm frame"));
        return eSIR_FAILURE;

    }
    pMac->lim.mgmtFrameSessionId = psessionEntry->smeSessionId;

    return eSIR_SUCCESS;
}

/* This Function is similar to PopulateDot11fHTCaps, except that the HT Capabilities
 * are considered from the AddStaReq rather from the cfg.dat as in PopulateDot11fHTCaps
 */
static tSirRetStatus limTdlsPopulateDot11fHTCaps(tpAniSirGlobal pMac, tpPESession psessionEntry,
            tSirTdlsAddStaReq *pTdlsAddStaReq, tDot11fIEHTCaps *pDot11f)
{
    tANI_U32                         nCfgValue;
    tANI_U8                          nCfgValue8;
    tSirMacHTParametersInfo         *pHTParametersInfo;
    union {
        tANI_U16                        nCfgValue16;
        tSirMacHTCapabilityInfo         htCapInfo;
        tSirMacExtendedHTCapabilityInfo extHtCapInfo;
    } uHTCapabilityInfo;

    tSirMacTxBFCapabilityInfo       *pTxBFCapabilityInfo;
    tSirMacASCapabilityInfo         *pASCapabilityInfo;

    nCfgValue = pTdlsAddStaReq->htCap.capInfo;

    uHTCapabilityInfo.nCfgValue16 = nCfgValue & 0xFFFF;

    pDot11f->advCodingCap             = uHTCapabilityInfo.htCapInfo.advCodingCap;
    pDot11f->mimoPowerSave            = uHTCapabilityInfo.htCapInfo.mimoPowerSave;
    pDot11f->greenField               = uHTCapabilityInfo.htCapInfo.greenField;
    pDot11f->shortGI20MHz             = uHTCapabilityInfo.htCapInfo.shortGI20MHz;
    pDot11f->shortGI40MHz             = uHTCapabilityInfo.htCapInfo.shortGI40MHz;
    pDot11f->txSTBC                   = uHTCapabilityInfo.htCapInfo.txSTBC;
    pDot11f->rxSTBC                   = uHTCapabilityInfo.htCapInfo.rxSTBC;
    pDot11f->delayedBA                = uHTCapabilityInfo.htCapInfo.delayedBA;
    pDot11f->maximalAMSDUsize         = uHTCapabilityInfo.htCapInfo.maximalAMSDUsize;
    pDot11f->dsssCckMode40MHz         = uHTCapabilityInfo.htCapInfo.dsssCckMode40MHz;
    pDot11f->psmp                     = uHTCapabilityInfo.htCapInfo.psmp;
    pDot11f->stbcControlFrame         = uHTCapabilityInfo.htCapInfo.stbcControlFrame;
    pDot11f->lsigTXOPProtection       = uHTCapabilityInfo.htCapInfo.lsigTXOPProtection;

    // All sessionized entries will need the check below
    if (psessionEntry == NULL) // Only in case of NO session
    {
        pDot11f->supportedChannelWidthSet = uHTCapabilityInfo.htCapInfo.supportedChannelWidthSet;
    }
    else
    {
        pDot11f->supportedChannelWidthSet = psessionEntry->htSupportedChannelWidthSet;
    }

    /* Ensure that shortGI40MHz is Disabled if supportedChannelWidthSet is
       eHT_CHANNEL_WIDTH_20MHZ */
    if(pDot11f->supportedChannelWidthSet == eHT_CHANNEL_WIDTH_20MHZ)
    {
       pDot11f->shortGI40MHz = 0;
    }

    limLog(pMac, LOG1,
           FL("SupportedChnlWidth: %d, mimoPS: %d, GF: %d, shortGI20:%d, shortGI40: %d, dsssCck: %d"),
           pDot11f->supportedChannelWidthSet,
           pDot11f->mimoPowerSave,
           pDot11f->greenField,
           pDot11f->shortGI20MHz,
           pDot11f->shortGI40MHz,
           pDot11f->dsssCckMode40MHz);

    nCfgValue = pTdlsAddStaReq->htCap.ampduParamsInfo;

    nCfgValue8 = ( tANI_U8 ) nCfgValue;
    pHTParametersInfo = ( tSirMacHTParametersInfo* ) &nCfgValue8;

    pDot11f->maxRxAMPDUFactor = pHTParametersInfo->maxRxAMPDUFactor;
    pDot11f->mpduDensity      = pHTParametersInfo->mpduDensity;
    pDot11f->reserved1        = pHTParametersInfo->reserved;

    limLog(pMac, LOG1, FL("AMPDU Param: %x"), nCfgValue);

    vos_mem_copy( pDot11f->supportedMCSSet, pTdlsAddStaReq->htCap.suppMcsSet,
                  SIZE_OF_SUPPORTED_MCS_SET);

    nCfgValue = pTdlsAddStaReq->htCap.extendedHtCapInfo;

    uHTCapabilityInfo.nCfgValue16 = nCfgValue & 0xFFFF;

    pDot11f->pco            = uHTCapabilityInfo.extHtCapInfo.pco;
    pDot11f->transitionTime = uHTCapabilityInfo.extHtCapInfo.transitionTime;
    pDot11f->mcsFeedback    = uHTCapabilityInfo.extHtCapInfo.mcsFeedback;

    nCfgValue = pTdlsAddStaReq->htCap.txBFCapInfo;

    pTxBFCapabilityInfo = ( tSirMacTxBFCapabilityInfo* ) &nCfgValue;
    pDot11f->txBF                                       = pTxBFCapabilityInfo->txBF;
    pDot11f->rxStaggeredSounding                        = pTxBFCapabilityInfo->rxStaggeredSounding;
    pDot11f->txStaggeredSounding                        = pTxBFCapabilityInfo->txStaggeredSounding;
    pDot11f->rxZLF                                      = pTxBFCapabilityInfo->rxZLF;
    pDot11f->txZLF                                      = pTxBFCapabilityInfo->txZLF;
    pDot11f->implicitTxBF                               = pTxBFCapabilityInfo->implicitTxBF;
    pDot11f->calibration                                = pTxBFCapabilityInfo->calibration;
    pDot11f->explicitCSITxBF                            = pTxBFCapabilityInfo->explicitCSITxBF;
    pDot11f->explicitUncompressedSteeringMatrix         = pTxBFCapabilityInfo->explicitUncompressedSteeringMatrix;
    pDot11f->explicitBFCSIFeedback                      = pTxBFCapabilityInfo->explicitBFCSIFeedback;
    pDot11f->explicitUncompressedSteeringMatrixFeedback = pTxBFCapabilityInfo->explicitUncompressedSteeringMatrixFeedback;
    pDot11f->explicitCompressedSteeringMatrixFeedback   = pTxBFCapabilityInfo->explicitCompressedSteeringMatrixFeedback;
    pDot11f->csiNumBFAntennae                           = pTxBFCapabilityInfo->csiNumBFAntennae;
    pDot11f->uncompressedSteeringMatrixBFAntennae       = pTxBFCapabilityInfo->uncompressedSteeringMatrixBFAntennae;
    pDot11f->compressedSteeringMatrixBFAntennae         = pTxBFCapabilityInfo->compressedSteeringMatrixBFAntennae;

    nCfgValue = pTdlsAddStaReq->htCap.antennaSelectionInfo;

    nCfgValue8 = ( tANI_U8 ) nCfgValue;

    pASCapabilityInfo = ( tSirMacASCapabilityInfo* ) &nCfgValue8;
    pDot11f->antennaSelection         = pASCapabilityInfo->antennaSelection;
    pDot11f->explicitCSIFeedbackTx    = pASCapabilityInfo->explicitCSIFeedbackTx;
    pDot11f->antennaIndicesFeedbackTx = pASCapabilityInfo->antennaIndicesFeedbackTx;
    pDot11f->explicitCSIFeedback      = pASCapabilityInfo->explicitCSIFeedback;
    pDot11f->antennaIndicesFeedback   = pASCapabilityInfo->antennaIndicesFeedback;
    pDot11f->rxAS                     = pASCapabilityInfo->rxAS;
    pDot11f->txSoundingPPDUs          = pASCapabilityInfo->txSoundingPPDUs;

    pDot11f->present = pTdlsAddStaReq->htcap_present;

    return eSIR_SUCCESS;

}

tSirRetStatus
limTdlsPopulateDot11fVHTCaps(tpAniSirGlobal pMac,
                      tSirTdlsAddStaReq *pTdlsAddStaReq,
                      tDot11fIEVHTCaps  *pDot11f)
{
    tANI_U32             nCfgValue=0;
    union {
        tANI_U32                       nCfgValue32;
        tSirMacVHTCapabilityInfo       vhtCapInfo;
    } uVHTCapabilityInfo;
    union {
        tANI_U16                       nCfgValue16;
        tSirMacVHTTxSupDataRateInfo    vhtTxSupDataRateInfo;
        tSirMacVHTRxSupDataRateInfo    vhtRxsupDataRateInfo;
    } uVHTSupDataRateInfo;

    pDot11f->present = pTdlsAddStaReq->vhtcap_present;

    nCfgValue = pTdlsAddStaReq->vhtCap.vhtCapInfo;
    uVHTCapabilityInfo.nCfgValue32 = nCfgValue;

    pDot11f->maxMPDULen =  uVHTCapabilityInfo.vhtCapInfo.maxMPDULen;
    pDot11f->supportedChannelWidthSet =  uVHTCapabilityInfo.vhtCapInfo.supportedChannelWidthSet;
    pDot11f->ldpcCodingCap =  uVHTCapabilityInfo.vhtCapInfo.ldpcCodingCap;
    pDot11f->shortGI80MHz =  uVHTCapabilityInfo.vhtCapInfo.shortGI80MHz;
    pDot11f->shortGI160and80plus80MHz =  uVHTCapabilityInfo.vhtCapInfo.shortGI160and80plus80MHz;
    pDot11f->txSTBC =  uVHTCapabilityInfo.vhtCapInfo.txSTBC;
    pDot11f->rxSTBC =  uVHTCapabilityInfo.vhtCapInfo.rxSTBC;
    pDot11f->suBeamFormerCap =  uVHTCapabilityInfo.vhtCapInfo.suBeamFormerCap;
    pDot11f->suBeamformeeCap =  uVHTCapabilityInfo.vhtCapInfo.suBeamformeeCap;
    pDot11f->csnofBeamformerAntSup =  uVHTCapabilityInfo.vhtCapInfo.csnofBeamformerAntSup;
    pDot11f->numSoundingDim =  uVHTCapabilityInfo.vhtCapInfo.numSoundingDim;
    pDot11f->muBeamformerCap =  uVHTCapabilityInfo.vhtCapInfo.muBeamformerCap;
    pDot11f->muBeamformeeCap =  uVHTCapabilityInfo.vhtCapInfo.muBeamformeeCap;
    pDot11f->vhtTXOPPS =  uVHTCapabilityInfo.vhtCapInfo.vhtTXOPPS;
    pDot11f->htcVHTCap =  uVHTCapabilityInfo.vhtCapInfo.htcVHTCap;
    pDot11f->maxAMPDULenExp =  uVHTCapabilityInfo.vhtCapInfo.maxAMPDULenExp;
    pDot11f->vhtLinkAdaptCap =  uVHTCapabilityInfo.vhtCapInfo.vhtLinkAdaptCap;
    pDot11f->rxAntPattern =  uVHTCapabilityInfo.vhtCapInfo.rxAntPattern;
    pDot11f->txAntPattern =  uVHTCapabilityInfo.vhtCapInfo.txAntPattern;
    pDot11f->reserved1= uVHTCapabilityInfo.vhtCapInfo.reserved1;

    pDot11f->rxMCSMap = pTdlsAddStaReq->vhtCap.suppMcs.rxMcsMap;

    nCfgValue = pTdlsAddStaReq->vhtCap.suppMcs.rxHighest;
    uVHTSupDataRateInfo.nCfgValue16 = nCfgValue & 0xffff;
    pDot11f->rxHighSupDataRate = uVHTSupDataRateInfo.vhtRxsupDataRateInfo.rxSupDataRate;

    pDot11f->txMCSMap = pTdlsAddStaReq->vhtCap.suppMcs.txMcsMap;

    nCfgValue = pTdlsAddStaReq->vhtCap.suppMcs.txHighest;
    uVHTSupDataRateInfo.nCfgValue16 = nCfgValue & 0xffff;
    pDot11f->txSupDataRate = uVHTSupDataRateInfo.vhtTxSupDataRateInfo.txSupDataRate;

    pDot11f->reserved3= uVHTSupDataRateInfo.vhtTxSupDataRateInfo.reserved;

    limLogVHTCap(pMac, pDot11f);

    return eSIR_SUCCESS;

}

static tSirRetStatus
limTdlsPopulateMatchingRateSet(tpAniSirGlobal pMac,
                           tpDphHashNode pStaDs,
                           tANI_U8 *pSupportedRateSet,
                           tANI_U8 supporteRatesLength,
                           tANI_U8* pSupportedMCSSet,
                           tSirMacPropRateSet *pAniLegRateSet,
                           tpPESession  psessionEntry,
                           tDot11fIEVHTCaps *pVHTCaps)

{
    tSirMacRateSet    tempRateSet;
    tANI_U32          i,j,val,min,isArate;
    tSirMacRateSet    tempRateSet2;
    tANI_U32 phyMode;
    tANI_U8 mcsSet[SIZE_OF_SUPPORTED_MCS_SET];
    isArate=0;
    tempRateSet2.numRates = 0;

    // limGetPhyMode(pMac, &phyMode);
    limGetPhyMode(pMac, &phyMode, NULL);

    // get own rate set
    val = WNI_CFG_OPERATIONAL_RATE_SET_LEN;
    if (wlan_cfgGetStr(pMac, WNI_CFG_OPERATIONAL_RATE_SET,
                                          (tANI_U8 *) &tempRateSet.rate,
                                          &val) != eSIR_SUCCESS)
    {
        /// Could not get rateset from CFG. Log error.
        limLog(pMac, LOGE, FL("could not retrieve rateset"));
        val = 0;
    }
    tempRateSet.numRates = val;

    if (phyMode == WNI_CFG_PHY_MODE_11G)
    {

        // get own extended rate set
        val = WNI_CFG_EXTENDED_OPERATIONAL_RATE_SET_LEN;
        if (wlan_cfgGetStr(pMac, WNI_CFG_EXTENDED_OPERATIONAL_RATE_SET,
                                                  (tANI_U8 *) &tempRateSet2.rate,
                                                  &val) != eSIR_SUCCESS)
        tempRateSet2.numRates = val;
    }

    if ((tempRateSet.numRates + tempRateSet2.numRates) > 12)
    {
        limLog(pMac, LOGE, FL("more than 12 rates in CFG"));
        goto error;
    }

    /**
         * Handling of the rate set IEs is the following:
         * - keep only rates that we support and that the station supports
         * - sort and the rates into the pSta->rate array
         */

    // Copy all rates in tempRateSet, there are 12 rates max
    for (i = 0; i < tempRateSet2.numRates; i++)
        tempRateSet.rate[i + tempRateSet.numRates] = tempRateSet2.rate[i];

    tempRateSet.numRates += tempRateSet2.numRates;

    /**
         * Sort rates in tempRateSet (they are likely to be already sorted)
         * put the result in tempRateSet2
         */
    tempRateSet2.numRates = 0;

    for (i = 0;i < tempRateSet.numRates; i++)
    {
        min = 0;
        val = 0xff;

        for(j = 0;j < tempRateSet.numRates; j++)
            if ((tANI_U32) (tempRateSet.rate[j] & 0x7f) < val)
            {
                val = tempRateSet.rate[j] & 0x7f;
                min = j;
            }

        tempRateSet2.rate[tempRateSet2.numRates++] = tempRateSet.rate[min];
        tempRateSet.rate[min] = 0xff;
    }

    /**
     * Copy received rates in tempRateSet, the parser has ensured
     * unicity of the rates so there cannot be more than 12 . Need to Check this
     * TODO Sunil.
     */
    if (supporteRatesLength > SIR_MAC_RATESET_EID_MAX)
    {
       limLog(pMac, LOGW,
              FL("Supported rates length %d more than the Max limit, reset to Max"),
              supporteRatesLength);
       supporteRatesLength = SIR_MAC_RATESET_EID_MAX;
    }
    for (i = 0; i < supporteRatesLength; i++)
    {
        tempRateSet.rate[i] = pSupportedRateSet[i];
    }
    tempRateSet.numRates = supporteRatesLength;

    {
        tpSirSupportedRates  rates = &pStaDs->supportedRates;
        tANI_U8 aRateIndex = 0;
        tANI_U8 bRateIndex = 0;
        vos_mem_set( (tANI_U8 *) rates, sizeof(tSirSupportedRates), 0);

        for (i = 0;i < tempRateSet2.numRates; i++)
        {
            for (j = 0;j < tempRateSet.numRates; j++)
            {
                if ((tempRateSet2.rate[i] & 0x7F) ==
                        (tempRateSet.rate[j] & 0x7F))
                {
                    if (sirIsArate(tempRateSet2.rate[i] & 0x7f))
                    {
                        isArate=1;
                        if (aRateIndex < SIR_NUM_11A_RATES)
                            rates->llaRates[aRateIndex++] =
                                tempRateSet2.rate[i];
                    }
                    else
                    {
                        if (bRateIndex < SIR_NUM_11B_RATES)
                            rates->llbRates[bRateIndex++] =
                                tempRateSet2.rate[i];
                    }
                    break;
                }
            }
        }
    }


    //compute the matching MCS rate set, if peer is 11n capable and self mode is 11n
#ifdef FEATURE_WLAN_TDLS
    if (pStaDs->mlmStaContext.htCapability)
#else
    if (IS_DOT11_MODE_HT(psessionEntry->dot11mode) &&
       (pStaDs->mlmStaContext.htCapability))
#endif
    {
        val = SIZE_OF_SUPPORTED_MCS_SET;
        if (wlan_cfgGetStr(pMac, WNI_CFG_SUPPORTED_MCS_SET,
                           mcsSet,
                           &val) != eSIR_SUCCESS)
        {
            /// Could not get rateset from CFG. Log error.
            limLog(pMac, LOGP, FL("could not retrieve supportedMCSSet"));
            goto error;
        }

        for (i=0; i<val; i++)
            pStaDs->supportedRates.supportedMCSSet[i] = mcsSet[i] & pSupportedMCSSet[i];

        limLog(pMac, LOG1, FL("MCS Rate Set Bitmap from CFG and DPH:"));
        for (i=0; i<SIR_MAC_MAX_SUPPORTED_MCS_SET; i++)
        {
            limLog(pMac, LOG1, FL("%x %x"),
                               mcsSet[i],
                               pStaDs->supportedRates.supportedMCSSet[i]);
        }
    }

#ifdef WLAN_FEATURE_11AC
    limPopulateVhtMcsSet(pMac, &pStaDs->supportedRates, pVHTCaps, psessionEntry);
#endif
    /**
         * Set the erpEnabled bit iff the phy is in G mode and at least
         * one A rate is supported
         */
    if ((phyMode == WNI_CFG_PHY_MODE_11G) && isArate)
        pStaDs->erpEnabled = eHAL_SET;



    return eSIR_SUCCESS;

 error:

    return eSIR_FAILURE;
}

static int limTdlsSelectCBMode(tDphHashNode *pStaDs, tpPESession psessionEntry)
{
    tANI_U8 channel = psessionEntry->currentOperChannel;

    if ( pStaDs->mlmStaContext.vhtCapability )
    {
        if ( channel== 36 || channel == 52 || channel == 100 ||
             channel == 116 || channel == 149 )
        {
           return PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW - 1;
        }
        else if ( channel == 40 || channel == 56 || channel == 104 ||
             channel == 120 || channel == 153 )
        {
           return PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW - 1;
        }
        else if ( channel == 44 || channel == 60 || channel == 108 ||
                  channel == 124 || channel == 157 )
        {
           return PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH -1;
        }
        else if ( channel == 48 || channel == 64 || channel == 112 ||
             channel == 128 || channel == 161 )
        {
            return PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH - 1;
        }
        else if ( channel == 165 )
        {
            return 0;
        }
    }
    else if ( pStaDs->mlmStaContext.htCapability )
    {
        if ( channel== 40 || channel == 48 || channel == 56 ||
             channel == 64 || channel == 104 || channel == 112 ||
             channel == 120 || channel == 128 || channel == 136 ||
             channel == 144 || channel == 153 || channel == 161 )
        {
           return 1;
        }
        else if ( channel== 36 || channel == 44 || channel == 52 ||
             channel == 60 || channel == 100 || channel == 108 ||
             channel == 116 || channel == 124 || channel == 132 ||
             channel == 140 || channel == 149 || channel == 157 )
        {
           return 2;
        }
        else if ( channel == 165 )
        {
           return 0;
        }
    }
    return 0;
}

/*
 * update HASH node entry info
 */
static void limTdlsUpdateHashNodeInfo(tpAniSirGlobal pMac, tDphHashNode *pStaDs,
              tSirTdlsAddStaReq *pTdlsAddStaReq, tpPESession psessionEntry)
{
    //tDot11fIEHTCaps *htCaps = &setupPeerInfo->tdlsPeerHTCaps ;
    tDot11fIEHTCaps htCap, *htCaps;
    tDot11fIEVHTCaps *pVhtCaps = NULL;
#ifdef WLAN_FEATURE_11AC
    tDot11fIEVHTCaps vhtCap;
    tANI_U8 cbMode;
#endif
    tpDphHashNode pSessStaDs = NULL;
    tANI_U16 aid;

    if (pTdlsAddStaReq->tdlsAddOper == TDLS_OPER_ADD)
    {
        PopulateDot11fHTCaps(pMac, psessionEntry, &htCap);
    }
    else if (pTdlsAddStaReq->tdlsAddOper == TDLS_OPER_UPDATE)
    {
        limTdlsPopulateDot11fHTCaps(pMac, NULL, pTdlsAddStaReq, &htCap);
    }
    htCaps = &htCap;
    if (htCaps->present)
    {
        pStaDs->mlmStaContext.htCapability = 1 ;
        pStaDs->htGreenfield = htCaps->greenField ;
        /* pStaDs->htSupportedChannelWidthSet should have the base channel
         * capability. The htSupportedChannelWidthSet of the TDLS link on
         * base channel should be less than or equal to channel width of
         * STA-AP link. So take this setting from the psessionEntry.
         */
        limLog(pMac, LOG1,
               FL("supportedChannelWidthSet %x htSupportedChannelWidthSet %x"),
               htCaps->supportedChannelWidthSet,
               psessionEntry->htSupportedChannelWidthSet);

        pStaDs->htSupportedChannelWidthSet =
                (htCaps->supportedChannelWidthSet <
                  psessionEntry->htSupportedChannelWidthSet) ?
                      htCaps->supportedChannelWidthSet :
                      psessionEntry->htSupportedChannelWidthSet;

        limLog(pMac, LOG1, FL("pStaDs->htSupportedChannelWidthSet %x"),
               pStaDs->htSupportedChannelWidthSet);

        pStaDs->htMIMOPSState =             htCaps->mimoPowerSave ;
        pStaDs->htMaxAmsduLength =  htCaps->maximalAMSDUsize;
        pStaDs->htAMpduDensity =    htCaps->mpduDensity;
        pStaDs->htDsssCckRate40MHzSupport = htCaps->dsssCckMode40MHz ;
        pStaDs->htShortGI20Mhz = htCaps->shortGI20MHz;
        pStaDs->htShortGI40Mhz = htCaps->shortGI40MHz;
        pStaDs->htMaxRxAMpduFactor = htCaps->maxRxAMPDUFactor;
        limFillRxHighestSupportedRate(pMac, 
                             &pStaDs->supportedRates.rxHighestDataRate, 
                                                 htCaps->supportedMCSSet);
        pStaDs->baPolicyFlag = 0xFF;
        pMac->lim.gLimTdlsLinkMode = TDLS_LINK_MODE_N ;
    }
    else
    {
        pStaDs->mlmStaContext.htCapability = 0 ;
        pMac->lim.gLimTdlsLinkMode = TDLS_LINK_MODE_BG ;
    }
#ifdef WLAN_FEATURE_11AC
    limTdlsPopulateDot11fVHTCaps(pMac, pTdlsAddStaReq, &vhtCap);
    pVhtCaps = &vhtCap;
    if (pVhtCaps->present)
    {
        pStaDs->mlmStaContext.vhtCapability = 1 ;

        pStaDs->vhtSupportedChannelWidthSet =
                    psessionEntry->vhtTxChannelWidthSet;

        limLog(pMac, LOG1, FL("Vht supported channel width is set to = %d"),
               pStaDs->vhtSupportedChannelWidthSet);

        pStaDs->vhtLdpcCapable = pVhtCaps->ldpcCodingCap;
        pStaDs->vhtBeamFormerCapable= pVhtCaps->suBeamFormerCap;
        // TODO , is it necessary , Sunil???
        pMac->lim.gLimTdlsLinkMode = TDLS_LINK_MODE_AC;
    }
    else
    {
        pStaDs->mlmStaContext.vhtCapability = 0 ;
        pStaDs->vhtSupportedChannelWidthSet = WNI_CFG_VHT_CHANNEL_WIDTH_20_40MHZ;
    }
#endif
    /*Calculate the Secondary Coannel Offset */
    cbMode = limTdlsSelectCBMode(pStaDs, psessionEntry);

    pStaDs->htSecondaryChannelOffset = cbMode;

#ifdef WLAN_FEATURE_11AC
    if ( pStaDs->mlmStaContext.vhtCapability )
    {
        pStaDs->htSecondaryChannelOffset = limGetHTCBState(cbMode);
    }
#endif

    pSessStaDs = dphLookupHashEntry(pMac, psessionEntry->bssId, &aid, 
                                          &psessionEntry->dph.dphHashTable) ;

    /* Lets enable QOS parameter */
    pStaDs->qosMode = (pTdlsAddStaReq->capability & CAPABILITIES_QOS_OFFSET) ||
                       pTdlsAddStaReq->htcap_present;
    pStaDs->wmeEnabled = 1;
    pStaDs->lleEnabled = 0;
    /*  TDLS Dummy AddSTA does not have qosInfo , is it OK ??
     */
    pStaDs->qos.capability.qosInfo = (*(tSirMacQosInfoStation *) &pTdlsAddStaReq->uapsd_queues);

    /* populate matching rate set */

    /* TDLS Dummy AddSTA does not have HTCap,VHTCap,Rates info , is it OK ??
     */
    limTdlsPopulateMatchingRateSet(pMac, pStaDs, pTdlsAddStaReq->supported_rates,
                                   pTdlsAddStaReq->supported_rates_length,
                                   (tANI_U8 *)pTdlsAddStaReq->htCap.suppMcsSet,
                                   &pStaDs->mlmStaContext.propRateSet,
                                   psessionEntry, pVhtCaps);

    /*  TDLS Dummy AddSTA does not have right capability , is it OK ??
     */
    pStaDs->mlmStaContext.capabilityInfo = ( *(tSirMacCapabilityInfo *) &pTdlsAddStaReq->capability);

    return ; 
}

/*
 * Add STA for TDLS setup procedure
 */
static tSirRetStatus limTdlsSetupAddSta(tpAniSirGlobal pMac,
                                        tSirTdlsAddStaReq *pAddStaReq,
                                        tpPESession psessionEntry)
{
    tpDphHashNode pStaDs = NULL ;
    tSirRetStatus status = eSIR_SUCCESS ;
    tANI_U16 aid = 0 ;

    pStaDs = dphLookupHashEntry(pMac, pAddStaReq->peerMac, &aid,
                                      &psessionEntry->dph.dphHashTable);
    if(NULL == pStaDs)
    {
        aid = limAssignPeerIdx(pMac, psessionEntry) ;

        if( !aid )
        {
            limLog(pMac, LOGE, FL("No more free AID for peer " MAC_ADDRESS_STR),
                               MAC_ADDR_ARRAY(pAddStaReq->peerMac));
            return eSIR_FAILURE;
        }

        /* Set the aid in peerAIDBitmap as it has been assigned to TDLS peer */
        SET_PEER_AID_BITMAP(psessionEntry->peerAIDBitmap, aid);

        limLog(pMac, LOG1, FL("Aid = %d, for peer =" MAC_ADDRESS_STR),
                           aid, MAC_ADDR_ARRAY(pAddStaReq->peerMac));
        pStaDs = dphGetHashEntry(pMac, aid, &psessionEntry->dph.dphHashTable);

        if (pStaDs)
        {
            (void) limDelSta(pMac, pStaDs, false /*asynchronous*/, psessionEntry);
            limDeleteDphHashEntry(pMac, pStaDs->staAddr, aid, psessionEntry);
        }

        pStaDs = dphAddHashEntry(pMac, pAddStaReq->peerMac, aid,
                                             &psessionEntry->dph.dphHashTable) ;

        if(NULL == pStaDs)
        {
            limLog(pMac, LOGE, FL("add hash entry failed"));
            VOS_ASSERT(0) ;
            return eSIR_FAILURE;
        }
    }

    limTdlsUpdateHashNodeInfo(pMac, pStaDs, pAddStaReq, psessionEntry) ;

    pStaDs->staType = STA_ENTRY_TDLS_PEER ;

    status = limAddSta(pMac, pStaDs, (pAddStaReq->tdlsAddOper == TDLS_OPER_UPDATE) ? true: false, psessionEntry);

    if(eSIR_SUCCESS != status)
    {
        /* should not fail */
        VOS_ASSERT(0) ;
    }
    return status ;
}

/*
 * Del STA, after Link is teardown or discovery response sent on direct link
 */
static tpDphHashNode limTdlsDelSta(tpAniSirGlobal pMac, tSirMacAddr peerMac, 
                                                    tpPESession psessionEntry)
{
    tSirRetStatus status = eSIR_SUCCESS ;
    tANI_U16 peerIdx = 0 ;
    tpDphHashNode pStaDs = NULL ;
 
    pStaDs = dphLookupHashEntry(pMac, peerMac, &peerIdx, 
                                         &psessionEntry->dph.dphHashTable) ;

    if(pStaDs)
    {
    
        limLog(pMac, LOG1, FL("DEL STA peer MAC: "MAC_ADDRESS_STR),
                           MAC_ADDR_ARRAY(pStaDs->staAddr));
        limLog(pMac, LOG1, FL("STA type = %x, sta idx = %x"),
                           pStaDs->staType,
                           pStaDs->staIndex);
        limDeleteBASessions(pMac, psessionEntry, BA_BOTH_DIRECTIONS,
                            eSIR_MAC_PEER_TIMEDOUT_REASON);
        status = limDelSta(pMac, pStaDs, false, psessionEntry) ;
    }
           
    return pStaDs ;
}
     
/* 
 * Once Link is setup with PEER, send Add STA ind to SME
 */
static eHalStatus limSendSmeTdlsAddStaRsp(tpAniSirGlobal pMac, 
                   tANI_U8 sessionId, tSirMacAddr peerMac, tANI_U8 updateSta,
                   tDphHashNode  *pStaDs, tANI_U8 status)
{
    tSirMsgQ  mmhMsg = {0} ;
    tSirTdlsAddStaRsp *addStaRsp = NULL ;
    mmhMsg.type = eWNI_SME_TDLS_ADD_STA_RSP ;

    addStaRsp = vos_mem_malloc(sizeof(tSirTdlsAddStaRsp));
    if ( NULL == addStaRsp )
    {
        limLog(pMac, LOGE, FL("Failed to allocate memory"));
        return eSIR_FAILURE;
    }

    addStaRsp->sessionId = sessionId;
    addStaRsp->statusCode = status;
    if( pStaDs )
    {
        addStaRsp->staId = pStaDs->staIndex ;
        addStaRsp->ucastSig = pStaDs->ucUcastSig ;
        addStaRsp->bcastSig = pStaDs->ucBcastSig ;
    }
    if( peerMac )
    {
        vos_mem_copy( addStaRsp->peerMac,
                (tANI_U8 *) peerMac, sizeof(tSirMacAddr));
    }
    if (updateSta)
        addStaRsp->tdlsAddOper = TDLS_OPER_UPDATE;
    else
        addStaRsp->tdlsAddOper = TDLS_OPER_ADD;

    addStaRsp->length = sizeof(tSirTdlsAddStaRsp) ;
    addStaRsp->messageType = eWNI_SME_TDLS_ADD_STA_RSP ;

    mmhMsg.bodyptr = addStaRsp;
    mmhMsg.bodyval = 0;
    limSysProcessMmhMsgApi(pMac, &mmhMsg, ePROT);

    return eSIR_SUCCESS ;

}
/* 
 * STA RSP received from HAL
 */
eHalStatus limProcessTdlsAddStaRsp(tpAniSirGlobal pMac, void *msg, 
                                                   tpPESession psessionEntry)
{
    tAddStaParams  *pAddStaParams = (tAddStaParams *) msg ;
    tANI_U8        status = eSIR_SUCCESS ;
    tDphHashNode   *pStaDs = NULL ;
    tANI_U16        aid = 0 ;

    SET_LIM_PROCESS_DEFD_MESGS(pMac, true);
    limLog(pMac, LOG1, FL("staIdx=%d, staMac="MAC_ADDRESS_STR),
                       pAddStaParams->staIdx,
                       MAC_ADDR_ARRAY(pAddStaParams->staMac));

    if (pAddStaParams->status != eHAL_STATUS_SUCCESS)
    {
        VOS_ASSERT(0) ;
        limLog(pMac, LOGE, FL("Add sta failed "));
        status = eSIR_FAILURE;
        goto add_sta_error;
    }

    pStaDs = dphLookupHashEntry(pMac, pAddStaParams->staMac, &aid, 
                                         &psessionEntry->dph.dphHashTable);
    if(NULL == pStaDs)
    {
        limLog(pMac, LOGE, FL("pStaDs is NULL "));
        status = eSIR_FAILURE;
        goto add_sta_error;
    }

    pStaDs->bssId                  = pAddStaParams->bssIdx;
    pStaDs->staIndex               = pAddStaParams->staIdx;
    pStaDs->ucUcastSig             = pAddStaParams->ucUcastSig;
    pStaDs->ucBcastSig             = pAddStaParams->ucBcastSig;
    pStaDs->mlmStaContext.mlmState = eLIM_MLM_LINK_ESTABLISHED_STATE;
    pStaDs->valid                  = 1 ;
add_sta_error:
    status = limSendSmeTdlsAddStaRsp(pMac, psessionEntry->smeSessionId, 
                                        pAddStaParams->staMac, pAddStaParams->updateSta, pStaDs, status) ;
    vos_mem_free( pAddStaParams );
    return status ;
}

void PopulateDot11fTdlsOffchannelParams(tpAniSirGlobal pMac,
                             tpPESession psessionEntry,
                             tDot11fIESuppChannels *suppChannels,
                             tDot11fIESuppOperatingClasses *suppOperClasses)
{
    tANI_U32   numChans = WNI_CFG_VALID_CHANNEL_LIST_LEN;
    tANI_U8    validChan[WNI_CFG_VALID_CHANNEL_LIST_LEN];
    tANI_U8    i, j;
    tANI_U8    op_class;
    if (wlan_cfgGetStr(pMac, WNI_CFG_VALID_CHANNEL_LIST,
                          validChan, &numChans) != eSIR_SUCCESS)
    {
        /**
         * Could not get Valid channel list from CFG.
         * Log error.
         */
         limLog(pMac, LOGE, FL("could not retrieve valid channel list"));
         return;
    }
    suppChannels->num_bands = (tANI_U8) numChans;

    for ( i = 0U, j = 0U; i < suppChannels->num_bands &&
                          j < LIM_MAX_BANDS; i++)
    {
        /* don't populate dfs channels in supported channels ie */
        if (!(NV_CHANNEL_DFS == vos_nv_getChannelEnabledState(validChan[i]))) {
            suppChannels->bands[j][0] = validChan[i];
            suppChannels->bands[j][1] = 1;
            /* store tdls self supported channels */
            tdlsSelfSupportedChannels[j] = validChan[i];
            j++;
        }
    }
    /* update the channel list with new length */
    suppChannels->num_bands = j;
    suppChannels->present = 1 ;
    /* store tdls self supported channels new length */
    tdlsSelfNumChans = j;

    /*Get present operating class based on current operating channel*/
    op_class = limGetOPClassFromChannel(
                                     pMac->scan.countryCodeCurrent,
                                     psessionEntry->currentOperChannel,
                                     psessionEntry->htSecondaryChannelOffset);
    if (op_class == 0)
    {
        limLog(pMac, LOGE,
               FL("Present Operating class is wrong, countryCodeCurrent: %s, currentOperChannel: %d, htSecondaryChannelOffset: %d"),
               pMac->scan.countryCodeCurrent,
               psessionEntry->currentOperChannel,
               psessionEntry->htSecondaryChannelOffset);
    }
    else
    {
        limLog(pMac, LOG1,
               FL("Present Operating channel=%d offset=%d class=%d"),
               psessionEntry->currentOperChannel,
               psessionEntry->htSecondaryChannelOffset,
               op_class);
    }
    suppOperClasses->present = 1;
    suppOperClasses->classes[0] = op_class;
    /*Fill operating classes from static array*/
    suppOperClasses->num_classes = op_classes.num_classes;
    for ( i = 0U; i < suppOperClasses->num_classes; i++)
    {
        suppOperClasses->classes[i+1] = op_classes.classes[i];

    }
    /*increment for present operating class*/
    suppOperClasses->num_classes++;
    return ;
}


/*
 * FUNCTION: Populate Link Identifier element IE
 *
 */


void PopulateDot11fLinkIden(tpAniSirGlobal pMac, tpPESession psessionEntry, 
                                 tDot11fIELinkIdentifier *linkIden,
                                       tSirMacAddr peerMac, tANI_U8 reqType)
{
    //tANI_U32 size = sizeof(tSirMacAddr) ;
    tANI_U8 *initStaAddr = NULL ;
    tANI_U8 *respStaAddr = NULL ;

    (reqType == TDLS_INITIATOR) ? ((initStaAddr = linkIden->InitStaAddr),
                                   (respStaAddr = linkIden->RespStaAddr))
                                : ((respStaAddr = linkIden->InitStaAddr ),
                                   (initStaAddr = linkIden->RespStaAddr)) ;
    vos_mem_copy( (tANI_U8 *)linkIden->bssid,
                     (tANI_U8 *) psessionEntry->bssId, sizeof(tSirMacAddr)) ; 

    vos_mem_copy( (tANI_U8 *)initStaAddr,
                          psessionEntry->selfMacAddr, sizeof(tSirMacAddr)) ;

    vos_mem_copy( (tANI_U8 *)respStaAddr, (tANI_U8 *) peerMac,
                                                       sizeof( tSirMacAddr ));

    linkIden->present = 1 ;
    return ;

}

void PopulateDot11fTdlsExtCapability(tpAniSirGlobal pMac, 
                                        tDot11fIEExtCap *extCapability)
{
    struct s_ext_cap *p_ext_cap = (struct s_ext_cap *)extCapability->bytes;

    p_ext_cap->TDLSPeerPSMSupp = PEER_PSM_SUPPORT ;
    p_ext_cap->TDLSPeerUAPSDBufferSTA = pMac->lim.gLimTDLSBufStaEnabled;
    p_ext_cap->TDLSChannelSwitching = pMac->lim.gLimTDLSOffChannelEnabled ;
    p_ext_cap->TDLSSupport = TDLS_SUPPORT ;
    p_ext_cap->TDLSProhibited = TDLS_PROHIBITED ;
    p_ext_cap->TDLSChanSwitProhibited = TDLS_CH_SWITCH_PROHIBITED ;

    extCapability->present = 1;
    extCapability->num_bytes = lim_compute_ext_cap_ie_length(extCapability);

    return ;
}

/*
 * Process Send Mgmt Request from SME and transmit to AP.
 */
tSirRetStatus limProcessSmeTdlsMgmtSendReq(tpAniSirGlobal pMac, 
                                                           tANI_U32 *pMsgBuf)
{
    /* get all discovery request parameters */
    tSirTdlsSendMgmtReq *pSendMgmtReq = (tSirTdlsSendMgmtReq*) pMsgBuf ;
    tpPESession psessionEntry;
    tANI_U8      sessionId;
    tSirResultCodes resultCode = eSIR_SME_INVALID_PARAMETERS;

    limLog(pMac, LOG1, FL("Send Mgmt Recieved"));

    if((psessionEntry = peFindSessionByBssid(pMac, pSendMgmtReq->bssid, &sessionId)) 
            == NULL)
    {
        limLog(pMac, LOGE,
               FL("PE Session does not exist for given sme sessionId %d"),
               pSendMgmtReq->sessionId);
        goto lim_tdls_send_mgmt_error;
    }

    /* check if we are in proper state to work as TDLS client */ 
    if (psessionEntry->limSystemRole != eLIM_STA_ROLE)
    {
        VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_ERROR, 
                "send mgmt received in wrong system Role %d",
                psessionEntry->limSystemRole);
        goto lim_tdls_send_mgmt_error;
    }

    /*
     * if we are still good, go ahead and check if we are in proper state to
     * do TDLS discovery req/rsp/....frames.
     */
    if ((psessionEntry->limSmeState != eLIM_SME_ASSOCIATED_STATE) &&
            (psessionEntry->limSmeState != eLIM_SME_LINK_EST_STATE))
    {

        limLog(pMac, LOGE, FL("send mgmt received in invalid LIMsme state (%d)"),
                           psessionEntry->limSmeState);
        goto lim_tdls_send_mgmt_error;
    }
    vos_tdls_tx_rx_mgmt_event(SIR_MAC_ACTION_TDLS,
              SIR_MAC_ACTION_TX, SIR_MAC_MGMT_ACTION,
              pSendMgmtReq->reqType, pSendMgmtReq->peerMac);

    switch( pSendMgmtReq->reqType )
    {
        case SIR_MAC_TDLS_DIS_REQ:
            limLog(pMac, LOG1, FL("Transmit Discovery Request Frame"));
            /* format TDLS discovery request frame and transmit it */
            limSendTdlsDisReqFrame(pMac, pSendMgmtReq->peerMac, pSendMgmtReq->dialog, 
                    psessionEntry) ;
            resultCode = eSIR_SME_SUCCESS;
            break;
        case SIR_MAC_TDLS_DIS_RSP:
            {
                limLog(pMac, LOG1, FL("Transmit Discovery Response Frame"));
                //Send a response mgmt action frame
                limSendTdlsDisRspFrame(pMac, pSendMgmtReq->peerMac,
                        pSendMgmtReq->dialog, psessionEntry,
                        &pSendMgmtReq->addIe[0],
                        (pSendMgmtReq->length - sizeof(tSirTdlsSendMgmtReq)));
                resultCode = eSIR_SME_SUCCESS;
            }
            break;
        case SIR_MAC_TDLS_SETUP_REQ:
            {
                limLog(pMac, LOG1, FL("Transmit Setup Request Frame"));
                limSendTdlsLinkSetupReqFrame(pMac,
                        pSendMgmtReq->peerMac, pSendMgmtReq->dialog, psessionEntry,
                        &pSendMgmtReq->addIe[0], (pSendMgmtReq->length - sizeof(tSirTdlsSendMgmtReq))); 
                resultCode = eSIR_SME_SUCCESS;
            }
            break;
        case SIR_MAC_TDLS_SETUP_RSP:
            {
                limLog(pMac, LOG1, FL("Transmit Setup Response Frame"));
                limSendTdlsSetupRspFrame(pMac, 
                        pSendMgmtReq->peerMac, pSendMgmtReq->dialog, psessionEntry, pSendMgmtReq->statusCode,
                        &pSendMgmtReq->addIe[0], (pSendMgmtReq->length - sizeof(tSirTdlsSendMgmtReq)));
                resultCode = eSIR_SME_SUCCESS;
            }
            break;
        case SIR_MAC_TDLS_SETUP_CNF:
            {
                limLog(pMac, LOG1, FL("Transmit Setup Confirm Frame"));
                limSendTdlsLinkSetupCnfFrame(pMac, pSendMgmtReq->peerMac, pSendMgmtReq->dialog, pSendMgmtReq->peerCapability,
                        psessionEntry, &pSendMgmtReq->addIe[0], (pSendMgmtReq->length - sizeof(tSirTdlsSendMgmtReq)));  
                resultCode = eSIR_SME_SUCCESS;
            }
            break;
        case SIR_MAC_TDLS_TEARDOWN:
            {
                limLog(pMac, LOG1, FL("Transmit Teardown Frame"));
                limSendTdlsTeardownFrame(pMac,
                        pSendMgmtReq->peerMac, pSendMgmtReq->statusCode, pSendMgmtReq->responder, psessionEntry,
                        &pSendMgmtReq->addIe[0], (pSendMgmtReq->length - sizeof(tSirTdlsSendMgmtReq))); 
                resultCode = eSIR_SME_SUCCESS;
            }
            break;
        case SIR_MAC_TDLS_PEER_TRAFFIC_IND:
            {
            }
            break;
        case SIR_MAC_TDLS_CH_SWITCH_REQ:
            {
            }
            break;
        case SIR_MAC_TDLS_CH_SWITCH_RSP:
            {
            }
            break;
        case SIR_MAC_TDLS_PEER_TRAFFIC_RSP:
            {
            }
            break;
        default:
            break;
    }

lim_tdls_send_mgmt_error:

    limSendSmeRsp( pMac, eWNI_SME_TDLS_SEND_MGMT_RSP,
            resultCode, pSendMgmtReq->sessionId, pSendMgmtReq->transactionId);

    return eSIR_SUCCESS;
}

/*
 * Send Response to Link Establish Request to SME
 */
void limSendSmeTdlsLinkEstablishReqRsp(tpAniSirGlobal pMac,
                    tANI_U8 sessionId, tSirMacAddr peerMac, tDphHashNode   *pStaDs,
                    tANI_U8 status)
{
    tSirMsgQ  mmhMsg = {0} ;

    tSirTdlsLinkEstablishReqRsp *pTdlsLinkEstablishReqRsp = NULL ;

    pTdlsLinkEstablishReqRsp = vos_mem_malloc(sizeof(tSirTdlsLinkEstablishReqRsp));
    if ( NULL == pTdlsLinkEstablishReqRsp )
    {
        limLog(pMac, LOGE, FL("Failed to allocate memory"));
        return ;
    }

    vos_mem_zero(pTdlsLinkEstablishReqRsp, sizeof(tSirTdlsLinkEstablishReqRsp));

    pTdlsLinkEstablishReqRsp->statusCode = status ;
    if (pStaDs && peerMac)
    {
        vos_mem_copy(pTdlsLinkEstablishReqRsp->peerMac, peerMac, sizeof(tSirMacAddr));
        pTdlsLinkEstablishReqRsp->sta_idx = pStaDs->staIndex;
    }

    pTdlsLinkEstablishReqRsp->sessionId = sessionId;

    mmhMsg.type = eWNI_SME_TDLS_LINK_ESTABLISH_RSP ;
    mmhMsg.bodyptr = pTdlsLinkEstablishReqRsp;
    mmhMsg.bodyval = 0;
    limSysProcessMmhMsgApi(pMac, &mmhMsg, ePROT);
    return ;


}

/*
 * Send Response to Chan Switch Request to SME
 */
void limSendSmeTdlsChanSwitchReqRsp(tpAniSirGlobal pMac,
                    tANI_U8 sessionId, tSirMacAddr peerMac, tDphHashNode   *pStaDs,
                    tANI_U8 status)
{
    tSirMsgQ  mmhMsg = {0} ;

    tSirTdlsChanSwitchReqRsp *pTdlsChanSwitchReqRsp = NULL ;

    pTdlsChanSwitchReqRsp = vos_mem_malloc(sizeof(tSirTdlsChanSwitchReqRsp));
    if ( NULL == pTdlsChanSwitchReqRsp )
    {
        PELOGE(limLog(pMac, LOGE, FL("Failed to allocate memory"));)
        return ;
    }

    vos_mem_zero(pTdlsChanSwitchReqRsp, sizeof(tSirTdlsChanSwitchReqRsp));

    pTdlsChanSwitchReqRsp->statusCode = status ;
    if (pStaDs && peerMac )
    {
        vos_mem_copy(pTdlsChanSwitchReqRsp->peerMac, peerMac, sizeof(tSirMacAddr));
        pTdlsChanSwitchReqRsp->sta_idx = pStaDs->staIndex;;
    }

    pTdlsChanSwitchReqRsp->sessionId = sessionId;

    mmhMsg.type = eWNI_SME_TDLS_CHANNEL_SWITCH_RSP ;
    mmhMsg.bodyptr = pTdlsChanSwitchReqRsp;
    mmhMsg.bodyval = 0;
    limSysProcessMmhMsgApi(pMac, &mmhMsg, ePROT);
    return ;


}
/*
 * Once link is teardown, send Del Peer Ind to SME
 */
static eHalStatus limSendSmeTdlsDelStaRsp(tpAniSirGlobal pMac, 
                    tANI_U8 sessionId, tSirMacAddr peerMac, tDphHashNode   *pStaDs,
                    tANI_U8 status)
{
    tSirMsgQ  mmhMsg = {0} ;
    tSirTdlsDelStaRsp *pDelSta = NULL ;
    mmhMsg.type = eWNI_SME_TDLS_DEL_STA_RSP ;

    pDelSta = vos_mem_malloc(sizeof(tSirTdlsDelStaRsp));
    if ( NULL == pDelSta )
    {
        limLog(pMac, LOGE, FL("Failed to allocate memory"));
            return eSIR_FAILURE;
    }

    pDelSta->sessionId = sessionId;
    pDelSta->statusCode =  status ;
    if( pStaDs )
    {
        pDelSta->staId = pStaDs->staIndex ;
    }
    else
        pDelSta->staId = HAL_STA_INVALID_IDX;

    if( peerMac )
    {
        vos_mem_copy(pDelSta->peerMac, peerMac, sizeof(tSirMacAddr));
    }

    pDelSta->length = sizeof(tSirTdlsDelStaRsp) ;
    pDelSta->messageType = eWNI_SME_TDLS_DEL_STA_RSP ;

    mmhMsg.bodyptr = pDelSta;

    mmhMsg.bodyval = 0;
    limSysProcessMmhMsgApi(pMac, &mmhMsg, ePROT);
    return eSIR_SUCCESS ;

}

/*
 * Process Send Mgmt Request from SME and transmit to AP.
 */
tSirRetStatus limProcessSmeTdlsAddStaReq(tpAniSirGlobal pMac, 
                                                           tANI_U32 *pMsgBuf)
{
    /* get all discovery request parameters */
    tSirTdlsAddStaReq *pAddStaReq = (tSirTdlsAddStaReq*) pMsgBuf ;
    tpPESession psessionEntry;
    tANI_U8      sessionId;

    limLog(pMac, LOG1, FL("TDLS Add STA Request Recieved"));

    if((psessionEntry = peFindSessionByBssid(pMac, pAddStaReq->bssid, &sessionId)) 
                                                                        == NULL)
    {
         limLog(pMac, LOGE,
                FL("PE Session does not exist for given sme sessionId %d"),
                pAddStaReq->sessionId);
         goto lim_tdls_add_sta_error;
    }
    
    /* check if we are in proper state to work as TDLS client */ 
    if (psessionEntry->limSystemRole != eLIM_STA_ROLE)
    {
        VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_ERROR, 
                         "send mgmt received in wrong system Role %d",
                                             psessionEntry->limSystemRole);
        goto lim_tdls_add_sta_error;
    }

    /*
     * if we are still good, go ahead and check if we are in proper state to
     * do TDLS discovery req/rsp/....frames.
     */
     if ((psessionEntry->limSmeState != eLIM_SME_ASSOCIATED_STATE) &&
                (psessionEntry->limSmeState != eLIM_SME_LINK_EST_STATE))
     {
     
         limLog(pMac, LOGE,
                FL("Add STA received in invalid LIMsme state (%d)"),
                psessionEntry->limSmeState);
         goto lim_tdls_add_sta_error;
     }

     pMac->lim.gLimAddStaTdls = true ;

     /* To start with, send add STA request to HAL */
     if (eSIR_FAILURE == limTdlsSetupAddSta(pMac, pAddStaReq, psessionEntry))
     {
         limLog(pMac, LOGE, FL("Add TDLS Station request failed"));
         goto lim_tdls_add_sta_error;
     }
     return eSIR_SUCCESS;
lim_tdls_add_sta_error:
     limSendSmeTdlsAddStaRsp(pMac, 
                   pAddStaReq->sessionId, pAddStaReq->peerMac,
                   (pAddStaReq->tdlsAddOper == TDLS_OPER_UPDATE), NULL, eSIR_FAILURE );

   return eSIR_SUCCESS;
}
/*
 * Process Del Sta Request from SME .
 */
tSirRetStatus limProcessSmeTdlsDelStaReq(tpAniSirGlobal pMac, 
                                                           tANI_U32 *pMsgBuf)
{
    /* get all discovery request parameters */
    tSirTdlsDelStaReq *pDelStaReq = (tSirTdlsDelStaReq*) pMsgBuf ;
    tpPESession psessionEntry;
    tANI_U8      sessionId;
    tpDphHashNode pStaDs = NULL ;

    limLog(pMac, LOG1, FL("TDLS Delete STA Request Recieved"));

    if((psessionEntry = peFindSessionByBssid(pMac, pDelStaReq->bssid, &sessionId)) 
            == NULL)
    {
        limLog(pMac, LOGE,
               FL("PE Session does not exist for given sme sessionId %d"),
               pDelStaReq->sessionId);
        limSendSmeTdlsDelStaRsp(pMac, pDelStaReq->sessionId, pDelStaReq->peerMac,
             NULL, eSIR_FAILURE) ;
        return eSIR_FAILURE;
    }

    /* check if we are in proper state to work as TDLS client */ 
    if (psessionEntry->limSystemRole != eLIM_STA_ROLE)
    {
        VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_ERROR, 
                "Del sta received in wrong system Role %d",
                psessionEntry->limSystemRole);
        goto lim_tdls_del_sta_error;
    }

    /*
     * if we are still good, go ahead and check if we are in proper state to
     * do TDLS discovery req/rsp/....frames.
     */
    if ((psessionEntry->limSmeState != eLIM_SME_ASSOCIATED_STATE) &&
            (psessionEntry->limSmeState != eLIM_SME_LINK_EST_STATE))
    {

        limLog(pMac, LOGE, FL("Del Sta received in invalid LIMsme state (%d)"),
                           psessionEntry->limSmeState);
        goto lim_tdls_del_sta_error;
    }

    pStaDs = limTdlsDelSta(pMac, pDelStaReq->peerMac, psessionEntry) ;

    /* now send indication to SME-->HDD->TL to remove STA from TL */

    if(pStaDs)
    {
        limSendSmeTdlsDelStaRsp(pMac, psessionEntry->smeSessionId, pDelStaReq->peerMac,
                pStaDs, eSIR_SUCCESS) ;
        limReleasePeerIdx(pMac, pStaDs->assocId, psessionEntry) ;

        /* Clear the aid in peerAIDBitmap as this aid is now in freepool */
        CLEAR_PEER_AID_BITMAP(psessionEntry->peerAIDBitmap, pStaDs->assocId);
        limDeleteDphHashEntry(pMac, pStaDs->staAddr, pStaDs->assocId, psessionEntry) ;

        return eSIR_SUCCESS;

    }

lim_tdls_del_sta_error:
     limSendSmeTdlsDelStaRsp(pMac, psessionEntry->smeSessionId, pDelStaReq->peerMac,
             NULL, eSIR_FAILURE) ;

    return eSIR_SUCCESS;
}

/* Intersects the two input arrays and outputs an array */
/* For now the array length of tANI_U8 suffices */
static void limTdlsGetIntersection(tANI_U8 *input_array1,tANI_U8 input1_length,
                            tANI_U8 *input_array2,tANI_U8 input2_length,
                            tANI_U8 *output_array,tANI_U8 *output_length)
{
    tANI_U8 i,j,k=0,flag=0;

    if (input1_length > WNI_CFG_VALID_CHANNEL_LIST_LEN)
    {
       input1_length = WNI_CFG_VALID_CHANNEL_LIST_LEN;
    }

    for(i=0;i<input1_length;i++)
    {
        flag=0;
        for(j=0;j<input2_length;j++)
        {
            if(input_array1[i]==input_array2[j])
            {
                flag=1;
                break;
            }
        }
        if(flag==1)
        {
            output_array[k]=input_array1[i];
            k++;
        }
    }
    *output_length = k;
}
/*
 * Process Link Establishment Request from SME .
 */
tSirRetStatus limProcesSmeTdlsLinkEstablishReq(tpAniSirGlobal pMac,
                                                           tANI_U32 *pMsgBuf)
{
    /* get all discovery request parameters */
    tSirTdlsLinkEstablishReq *pTdlsLinkEstablishReq = (tSirTdlsLinkEstablishReq*) pMsgBuf ;
    tpPESession psessionEntry;
    tANI_U8      sessionId;
    tpTdlsLinkEstablishParams pMsgTdlsLinkEstablishReq;
    tSirMsgQ msg;
    tANI_U16 peerIdx = 0 ;
    tpDphHashNode pStaDs = NULL ;

    limLog(pMac, LOG1, FL("Link Establish Request Recieved")) ;

    if((psessionEntry = peFindSessionByBssid(pMac, pTdlsLinkEstablishReq->bssid, &sessionId))
            == NULL)
    {
        limLog(pMac, LOGE,
               FL("PE Session does not exist for given sme sessionId %d"),
               pTdlsLinkEstablishReq->sessionId);
        limSendSmeTdlsLinkEstablishReqRsp(pMac, pTdlsLinkEstablishReq->sessionId, pTdlsLinkEstablishReq->peerMac,
             NULL, eSIR_FAILURE) ;
        return eSIR_FAILURE;
    }

    /* check if we are in proper state to work as TDLS client */
    if (psessionEntry->limSystemRole != eLIM_STA_ROLE)
    {
        VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_ERROR,
                "TDLS Link Establish Request received in wrong system Role %d",
                psessionEntry->limSystemRole);
        goto lim_tdls_link_establish_error;
    }

    /*
     * if we are still good, go ahead and check if we are in proper state to
     * do TDLS discovery req/rsp/....frames.
     */
    if ((psessionEntry->limSmeState != eLIM_SME_ASSOCIATED_STATE) &&
            (psessionEntry->limSmeState != eLIM_SME_LINK_EST_STATE))
    {

        limLog(pMac, LOGE,
               FL("TDLS Link Establish Request received in invalid LIMsme state (%d)"),
               psessionEntry->limSmeState);
        goto lim_tdls_link_establish_error;
    }
    /*TODO Sunil , TDLSPeer Entry has the STA ID , Use it */
    pStaDs = dphLookupHashEntry(pMac, pTdlsLinkEstablishReq->peerMac, &peerIdx,
                                &psessionEntry->dph.dphHashTable) ;
    if ( NULL == pStaDs )
    {
        limLog(pMac, LOGE, FL( "pStaDs is NULL"));
        goto lim_tdls_link_establish_error;

    }
    pMsgTdlsLinkEstablishReq = vos_mem_malloc(sizeof( tTdlsLinkEstablishParams ));
    if ( NULL == pMsgTdlsLinkEstablishReq )
    {
        limLog(pMac, LOGE,
               FL("Unable to allocate memory TDLS Link Establish Request"));
        return eSIR_MEM_ALLOC_FAILED;
    }

    vos_mem_set( (tANI_U8 *)pMsgTdlsLinkEstablishReq, sizeof(tTdlsLinkEstablishParams), 0);

    pMsgTdlsLinkEstablishReq->staIdx = pStaDs->staIndex;
    pMsgTdlsLinkEstablishReq->isResponder = pTdlsLinkEstablishReq->isResponder;
    pMsgTdlsLinkEstablishReq->uapsdQueues = pTdlsLinkEstablishReq->uapsdQueues;
    pMsgTdlsLinkEstablishReq->maxSp = pTdlsLinkEstablishReq->maxSp;
    pMsgTdlsLinkEstablishReq->isBufsta = pTdlsLinkEstablishReq->isBufSta;

    if (psessionEntry->tdlsChanSwitProhibited)
    {
        /* If channel switch is prohibited by AP then dut can either
         * send a switch channel request with failure status or it can
         * ignore the request without sending the response.
         * isOffChannelSupported = 0 disables the TDLS off-channel and
         * if off-channel support is disabled then FW ignores switch
         * channel request sent by TDLS peer */
        pMsgTdlsLinkEstablishReq->isOffChannelSupported = 0;
        limLog(pMac, LOG1, FL("Channel Switch Prohibited by AP"));
    }
    else
    {
        pMsgTdlsLinkEstablishReq->isOffChannelSupported =
            pTdlsLinkEstablishReq->isOffChannelSupported;
    }

    if ((pTdlsLinkEstablishReq->supportedChannelsLen > 0) &&
        (pTdlsLinkEstablishReq->supportedChannelsLen <= SIR_MAC_MAX_SUPP_CHANNELS))
    {
        /* check self supported channels and pass them to FW */
        if ((tdlsSelfNumChans > 0) &&
            (tdlsSelfNumChans < LIM_TDLS_MAX_NON_DFS_CHANNELS))
        {
            limTdlsGetIntersection(tdlsSelfSupportedChannels, tdlsSelfNumChans,
                               pTdlsLinkEstablishReq->supportedChannels,
                               pTdlsLinkEstablishReq->supportedChannelsLen,
                               pMsgTdlsLinkEstablishReq->validChannels,
                               &pMsgTdlsLinkEstablishReq->validChannelsLen);
        }
    }
    vos_mem_copy(pMsgTdlsLinkEstablishReq->validOperClasses,
                        pTdlsLinkEstablishReq->supportedOperClasses, pTdlsLinkEstablishReq->supportedOperClassesLen);
    pMsgTdlsLinkEstablishReq->validOperClassesLen =
                                pTdlsLinkEstablishReq->supportedOperClassesLen;

    msg.type = WDA_SET_TDLS_LINK_ESTABLISH_REQ;
    msg.reserved = 0;
    msg.bodyptr = pMsgTdlsLinkEstablishReq;
    msg.bodyval = 0;
    if(eSIR_SUCCESS != wdaPostCtrlMsg(pMac, &msg))
    {
        limLog(pMac, LOGE, FL("halPostMsgApi failed"));
        goto lim_tdls_link_establish_error;
    }
    return eSIR_SUCCESS;
lim_tdls_link_establish_error:
     limSendSmeTdlsLinkEstablishReqRsp(pMac, psessionEntry->smeSessionId, pTdlsLinkEstablishReq->peerMac,
                                       NULL, eSIR_FAILURE) ;

    return eSIR_SUCCESS;
}


/* Delete all the TDLS peer connected before leaving the BSS */
tSirRetStatus limDeleteTDLSPeers(tpAniSirGlobal pMac, tpPESession psessionEntry)
{
    tpDphHashNode pStaDs = NULL ;
    int i, aid;

    if (NULL == psessionEntry)
    {
        limLog(pMac, LOGE, FL("NULL psessionEntry"));
        return eSIR_FAILURE;
    }

    /* Check all the set bit in peerAIDBitmap and delete the peer (with that aid) entry
       from the hash table and add the aid in free pool */
    for (i = 0; i < sizeof(psessionEntry->peerAIDBitmap)/sizeof(tANI_U32); i++)
    {
        for (aid = 0; aid < (sizeof(tANI_U32) << 3); aid++)
        {
            if (CHECK_BIT(psessionEntry->peerAIDBitmap[i], aid))
            {
                pStaDs = dphGetHashEntry(pMac, (aid + i*(sizeof(tANI_U32) << 3)), &psessionEntry->dph.dphHashTable);

                if (NULL != pStaDs)
                {
                    limLog(pMac, LOGE, FL("Deleting "MAC_ADDRESS_STR),
                                       MAC_ADDR_ARRAY(pStaDs->staAddr));

                    limSendDeauthMgmtFrame(pMac, eSIR_MAC_DEAUTH_LEAVING_BSS_REASON,
                                           pStaDs->staAddr, psessionEntry, FALSE);
                    dphDeleteHashEntry(pMac, pStaDs->staAddr, pStaDs->assocId, &psessionEntry->dph.dphHashTable);
                }
                limReleasePeerIdx(pMac, (aid + i*(sizeof(tANI_U32) << 3)), psessionEntry) ;
                CLEAR_BIT(psessionEntry->peerAIDBitmap[i], aid);
            }
        }
    }
    limSendSmeTDLSDeleteAllPeerInd(pMac, psessionEntry);

    return eSIR_SUCCESS;
}


tANI_U8 limGetOffChMaxBwOffsetFromChannel(tANI_U8 *country,
                                          tANI_U8 channel,
                                          tANI_U8 peerVHTCapability)
{
    op_class_map_t *class = NULL;
    tANI_U16 i = 0;
    offset_t offset = BW20, max_allowed = BW80;

    if ((TRUE == peerVHTCapability) &&
        IS_FEATURE_SUPPORTED_BY_FW(DOT11AC) &&
        IS_FEATURE_SUPPORTED_BY_DRIVER(DOT11AC))
        max_allowed = BW80;
    else
        max_allowed = BW40MINUS;

    if (VOS_TRUE == vos_mem_compare(country,"US", 2))  {

        class = us_op_class;

    } else if (VOS_TRUE == vos_mem_compare(country,"EU", 2)) {

        class = euro_op_class;

    } else if (VOS_TRUE == vos_mem_compare(country,"JP", 2)) {

        class = japan_op_class;

    } else {

        class = global_op_class;

    }

    while (class->op_class)
    {
        for (i=0; (i < 25 && class->channels[i]); i++)
        {
            if (channel == class->channels[i] && class->offset <= max_allowed)
                offset = class->offset;
        }
        class++;
    }

    return offset;
}

offset_t lim_get_channel_width_from_opclass(tANI_U8 *country, tANI_U8 channel,
                                            tANI_U8 peer_vht_capable,
                                            tANI_U8 op_class)
{
    op_class_map_t *class;
    tANI_U16 i = 0;
    offset_t offset, max_allowed;

    if (peer_vht_capable &&
        IS_FEATURE_SUPPORTED_BY_FW(DOT11AC) &&
        IS_FEATURE_SUPPORTED_BY_DRIVER(DOT11AC))
        max_allowed = BW80;
    else
        max_allowed = BW40MINUS;

    if (vos_mem_compare(country,"US", 2))
        class = us_op_class;
    else if (vos_mem_compare(country,"EU", 2))
        class = euro_op_class;
    else if (vos_mem_compare(country,"JP", 2))
        class = japan_op_class;
    else
        class = global_op_class;

    while (class->op_class) {
        if (op_class == class->op_class) {
            for (i = 0; (i < 25 && class->channels[i]); i++) {
                 if (channel == class->channels[i]) {
                     offset = class->offset;
                     return (offset <= max_allowed) ? offset: BW20;
                 }
            }
        }
        class++;
    }

    return BW20;
}

tANI_U8 limGetOPClassFromChannel(tANI_U8 *country,
                                         tANI_U8 channel,
                                         tANI_U8 offset)
{
    op_class_map_t *class = NULL;
    tANI_U16 i = 0;

    if (VOS_TRUE == vos_mem_compare(country,"US", 2))  {

        class = us_op_class;

    } else if (VOS_TRUE == vos_mem_compare(country,"EU", 2)) {

        class = euro_op_class;

    } else if (VOS_TRUE == vos_mem_compare(country,"JP", 2)) {

        class = japan_op_class;

    } else {

        class = global_op_class;

    }

    while (class->op_class)
    {
        if ((offset == class->offset) || (offset == BWALL))
        {
            for (i=0; (i < 25 && class->channels[i]); i++)
            {
                if (channel == class->channels[i])
                    return class->op_class;
            }
        }
        class++;
    }
    return 0;
}

tANI_BOOLEAN  CheckAndAddOP(tANI_U8 class)
{
    tANI_U8 i;

    for (i=0; i < (SIR_MAC_MAX_SUPP_OPER_CLASSES - 1); i++)
    {
        /*0 is an invalid class. If class is already present ignore*/
        if (class == op_classes.classes[i])
            return FALSE;
        if(op_classes.classes[i] == 0)
        {
            return TRUE;
        }
    }
    //limLog(pMac, LOGE, FL("No space left for class = %d"), class);
    return FALSE;
}

void limInitOperatingClasses( tHalHandle hHal )
{

    tANI_U8 Index = 0;
    tANI_U8 class = 0;
    tANI_U8 i = 0;
    tANI_U8 j = 0;
    tANI_U8 swap = 0;
    tANI_U8 numChannels = 0;
    tpAniSirGlobal pMac = PMAC_STRUCT( hHal );
    limLog(pMac, LOG1, FL("Current Country = %c%c"),
                          pMac->scan.countryCodeCurrent[0],
                          pMac->scan.countryCodeCurrent[1]);

    vos_mem_set(op_classes.classes, sizeof(op_classes.classes), 0);
    numChannels = pMac->scan.baseChannels.numChannels;
    limLog(pMac, LOG1, "Num of base ch =%d", numChannels);
    for ( Index = 0;
          Index < numChannels && i < (SIR_MAC_MAX_SUPP_OPER_CLASSES - 1);
          Index++)
    {
        class = limGetOPClassFromChannel(
                            pMac->scan.countryCodeCurrent,
                            pMac->scan.baseChannels.channelList[ Index ],
                            BWALL);
        limLog(pMac, LOG4, "ch=%d <=> %d=class",
               pMac->scan.baseChannels.channelList[ Index ],
               class);
        if (CheckAndAddOP(class))
        {
            op_classes.classes[i]= class;
            i++;
        }
    }

    numChannels = pMac->scan.base20MHzChannels.numChannels;
    limLog(pMac, LOG1, "Num of 20MHz ch =%d", numChannels);
    for ( Index = 0;
          Index < numChannels && i < (SIR_MAC_MAX_SUPP_OPER_CLASSES - 1);
          Index++)
    {
        class = limGetOPClassFromChannel(
                            pMac->scan.countryCodeCurrent,
                            pMac->scan.base20MHzChannels.channelList[ Index ],
                            BWALL);
        limLog(pMac, LOG4, "ch=%d <=> %d=class",
               pMac->scan.base20MHzChannels.channelList[ Index ],
               class);
        if (CheckAndAddOP(class))
        {
            op_classes.classes[i]= class;
            i++;
        }
    }

    numChannels = pMac->scan.base40MHzChannels.numChannels;
    limLog(pMac, LOG1, "Num of 40MHz ch =%d", numChannels);
    for ( Index = 0;
          Index < numChannels && i < (SIR_MAC_MAX_SUPP_OPER_CLASSES - 1);
          Index++)
    {
        class = limGetOPClassFromChannel(
                            pMac->scan.countryCodeCurrent,
                            pMac->scan.base40MHzChannels.channelList[ Index ],
                            BWALL);
        limLog(pMac, LOG4, "ch=%d <=> %d=class",
               pMac->scan.base40MHzChannels.channelList[ Index ],
               class);
        if (CheckAndAddOP(class))
        {
            op_classes.classes[i]= class;
            i++;
        }
    }

    op_classes.num_classes = i;
    limLog(pMac, LOG1, "Total number of Unique supported classes =%d",
           op_classes.num_classes);
    /*as per spec the operating classes should be in ascending order*/
    /*Bubble sort is fine as we don't have many classes*/
    for (i = 0 ; i < ( op_classes.num_classes - 1 ); i++)
    {
        for (j = 0 ; j < op_classes.num_classes - i - 1; j++)
        {
            /* For decreasing order use < */
            if (op_classes.classes[j] > op_classes.classes[j+1])
            {
                swap = op_classes.classes[j];
                op_classes.classes[j] = op_classes.classes[j+1];
                op_classes.classes[j+1] = swap;
            }
        }
    }
    for (i=0; i < op_classes.num_classes; i++)
    {

        limLog(pMac, LOG1, "supported op_class[%d]=%d", i,
               op_classes.classes[i]);

    }
}

#endif
// tdlsoffchan
/*
 * Process Channel Switch from SME.
 */
tSirRetStatus limProcesSmeTdlsChanSwitchReq(tpAniSirGlobal pMac,
                                            tANI_U32 *pMsgBuf)
{
    /* get all discovery request parameters */
    tSirTdlsChanSwitch *pTdlsChanSwitch = (tSirTdlsChanSwitch*) pMsgBuf ;
    tpPESession            psessionEntry;
    tANI_U8                sessionId;
    tpTdlsChanSwitchParams pMsgTdlsChanSwitch;
    tSirMsgQ               msg;
    tANI_U16               peerIdx = 0;
    tpDphHashNode          pStaDs = NULL;

    VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_INFO,
             ("TDLS Channel Switch Recieved on peer:" MAC_ADDRESS_STR),
              MAC_ADDR_ARRAY(pTdlsChanSwitch->peerMac));

    psessionEntry = peFindSessionByBssid(pMac,
                                         pTdlsChanSwitch->bssid,
                                         &sessionId);
    if (psessionEntry == NULL)
    {
        VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_ERROR,
                  "PE Session does not exist for given sme sessionId %d",
                  pTdlsChanSwitch->sessionId);
        limSendSmeTdlsChanSwitchReqRsp(pMac, pTdlsChanSwitch->sessionId,
                                       pTdlsChanSwitch->peerMac,
                                       NULL, eSIR_FAILURE) ;
        return eSIR_FAILURE;
    }

    /* check if we are in proper state to work as TDLS client */
    if (psessionEntry->limSystemRole != eLIM_STA_ROLE)
    {
        VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_ERROR,
                  "TDLS Channel Switch received in wrong system Role %d",
                  psessionEntry->limSystemRole);
        goto lim_tdls_chan_switch_error;
    }

    /*
     * if we are still good, go ahead and check if we are in proper state to
     * do TDLS discovery req/rsp/....frames.
     */
    if ((psessionEntry->limSmeState != eLIM_SME_ASSOCIATED_STATE) &&
            (psessionEntry->limSmeState != eLIM_SME_LINK_EST_STATE))
    {

        limLog(pMac, LOGE, "TDLS Channel Switch received in invalid LIMsme state (%d)",
               psessionEntry->limSmeState);
        goto lim_tdls_chan_switch_error;
    }

    pStaDs = dphLookupHashEntry(pMac, pTdlsChanSwitch->peerMac, &peerIdx,
                                &psessionEntry->dph.dphHashTable) ;
    if ( NULL == pStaDs )
    {
        limLog( pMac, LOGE, FL( "pStaDs is NULL" ));
        goto lim_tdls_chan_switch_error;

    }
    pMsgTdlsChanSwitch = vos_mem_malloc(sizeof( tTdlsChanSwitchParams ));
    if ( NULL == pMsgTdlsChanSwitch )
    {
        limLog( pMac, LOGE,
                     FL( "Unable to allocate memory TDLS Channel Switch" ));
        return eSIR_MEM_ALLOC_FAILED;
    }

    vos_mem_set( (tANI_U8 *)pMsgTdlsChanSwitch, sizeof(*pMsgTdlsChanSwitch), 0);

    /* if channel bw offset is not set,
       send maximum supported offset in the band */
    if (pTdlsChanSwitch->tdlsOffChBwOffset == 0)
    {
        VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_INFO,
                  ("Set TDLS channel Bw Offset"));

        if ((pTdlsChanSwitch->tdlsOffCh >= 1) &&
            (pTdlsChanSwitch->tdlsOffCh <= 14))
        {
            pTdlsChanSwitch->tdlsOffChBwOffset = BW20;
        }
        else if ((pTdlsChanSwitch->tdlsOffCh >= 36) &&
                 (pTdlsChanSwitch->tdlsOffCh <= 169))
        {
            pTdlsChanSwitch->tdlsOffChBwOffset =
                                limGetOffChMaxBwOffsetFromChannel(
                                              pMac->scan.countryCodeCurrent,
                                              pTdlsChanSwitch->tdlsOffCh,
                                              pStaDs->mlmStaContext.vhtCapability);
        }
    }
    else
    {
        /* Channel Bandwidth Offset is set through iwpriv ioctl */
        (pTdlsChanSwitch->tdlsOffChBwOffset)--;
    }

    pMsgTdlsChanSwitch->staIdx = pStaDs->staIndex;
    pMsgTdlsChanSwitch->tdlsOffCh = pTdlsChanSwitch->tdlsOffCh;
    pMsgTdlsChanSwitch->tdlsOffChBwOffset = pTdlsChanSwitch->tdlsOffChBwOffset;
    pMsgTdlsChanSwitch->tdlsSwMode = pTdlsChanSwitch->tdlsSwMode;
    pMsgTdlsChanSwitch->operClass = limGetOPClassFromChannel(
                                           pMac->scan.countryCodeCurrent,
                                           pTdlsChanSwitch->tdlsOffCh,
                                           pTdlsChanSwitch->tdlsOffChBwOffset);

    if(pMsgTdlsChanSwitch->operClass == 0)
    {

        VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_ERROR,
                                   "Invalid Operating class 0 !!!");
        vos_mem_free(pMsgTdlsChanSwitch);
        goto lim_tdls_chan_switch_error;
    }
    else
    {

        VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_INFO,
              "%s: TDLS Channel Switch params: staIdx %d class %d ch %d bw %d"
              " mode %d country code %c%c",
               __func__,
               pMsgTdlsChanSwitch->staIdx,
               pMsgTdlsChanSwitch->operClass,
               pMsgTdlsChanSwitch->tdlsOffCh,
               pMsgTdlsChanSwitch->tdlsOffChBwOffset,
               pMsgTdlsChanSwitch->tdlsSwMode,
               pMac->scan.countryCodeCurrent[0],
               pMac->scan.countryCodeCurrent[1]);
    }

    msg.type = WDA_SET_TDLS_CHAN_SWITCH_REQ;
    msg.reserved = 0;
    msg.bodyptr = pMsgTdlsChanSwitch;
    msg.bodyval = 0;
    if(eSIR_SUCCESS != wdaPostCtrlMsg(pMac, &msg))
    {
        limLog(pMac, LOGE, FL("halPostMsgApi failed\n"));
        vos_mem_free(pMsgTdlsChanSwitch);
        goto lim_tdls_chan_switch_error;
    }

    return eSIR_SUCCESS;

lim_tdls_chan_switch_error:
    limSendSmeTdlsChanSwitchReqRsp(pMac, pTdlsChanSwitch->sessionId,
                                   pTdlsChanSwitch->peerMac,
                                   NULL, eSIR_FAILURE);
    return eSIR_FAILURE;
}

/*
 * Set 20_40 BSS Coex IE in TDLS frames.
 */
tSirRetStatus limProcessSmeSetTdls2040BSSCoexReq(tpAniSirGlobal pMac,
                                                 tANI_U32 *pMsgBuf)
{
    tAniSetTdls2040BSSCoex *pmsg = NULL;
    pmsg = (tAniSetTdls2040BSSCoex*) pMsgBuf ;

    if (NULL != pmsg) {
        pMac->lim.EnableTdls2040BSSCoexIE = pmsg->SetTdls2040BSSCoex;
    }
    VOS_TRACE(VOS_MODULE_ID_PE, VOS_TRACE_LEVEL_INFO,
              "%s: 20_40 BSS Coex IE in TDLS frames "
              "pMac->lim.EnableTdls2040BSSCoexIE %d ", __func__,
              pMac->lim.EnableTdls2040BSSCoexIE);

    return eSIR_SUCCESS;
}

tSirRetStatus limProcessSmeDelAllTdlsPeers(tpAniSirGlobal pMac,
                                                 tANI_U32 *pMsgBuf)
{
    tSirDelAllTdlsPeers *pMsg = NULL;
    tpDphHashNode pStaDs = NULL ;
    tpPESession psessionEntry = NULL;
    uint8_t sessionId;
    int i, aid;
    pMsg = (tSirDelAllTdlsPeers*) pMsgBuf ;

    if (pMsg == NULL) {
        limLog(pMac, LOGE, FL("NULL pMsg"));
        return eSIR_FAILURE;
    }

    psessionEntry = peFindSessionByBssid(pMac, pMsg->bssid, &sessionId);
    if (NULL == psessionEntry)
    {
        limLog(pMac, LOGE, FL("NULL psessionEntry"));
        return eSIR_FAILURE;
    }

    /* Check all the set bit in peerAIDBitmap and delete the
     * peer (with that aid) entry from the hash table and add
     * the aid in free pool
     */
    for (i = 0; i < sizeof(psessionEntry->peerAIDBitmap)/sizeof(tANI_U32); i++)
    {
        for (aid = 0; aid < (sizeof(tANI_U32) << 3); aid++)
        {
            if (CHECK_BIT(psessionEntry->peerAIDBitmap[i], aid))
            {
                pStaDs = dphGetHashEntry(pMac,
                                         (aid + i*(sizeof(tANI_U32) << 3)),
                                         &psessionEntry->dph.dphHashTable);
                if (NULL != pStaDs)
                {
                    limLog(pMac, LOGE, FL("Deleting "MAC_ADDRESS_STR),
                           MAC_ADDR_ARRAY(pStaDs->staAddr));

                    limSendDeauthMgmtFrame(pMac,
                                           eSIR_MAC_DEAUTH_LEAVING_BSS_REASON,
                                           pStaDs->staAddr, psessionEntry,
                                           FALSE);

                    limTdlsDelSta(pMac, pStaDs->staAddr, psessionEntry);

                    dphDeleteHashEntry(pMac, pStaDs->staAddr, pStaDs->assocId,
                                       &psessionEntry->dph.dphHashTable);
                }
                limReleasePeerIdx(pMac, (aid + i*(sizeof(tANI_U32) << 3)),
                                  psessionEntry) ;
                CLEAR_BIT(psessionEntry->peerAIDBitmap[i], aid);
            }
        }
    }

    return eSIR_SUCCESS;
}