CORE/HDD/src/wlan_hdd_p2p.c

/*
 * Copyright (c) 2012-2013, 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.
 */
/*
 * Copyright (c) 2012, 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.
 */

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

  \file  wlan_hdd_p2p.c

  \brief WLAN Host Device Driver implementation for P2P commands interface

  Copyright 2008 (c) Qualcomm, Incorporated.  All Rights Reserved.

  Qualcomm Confidential and Proprietary.

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

#include <wlan_hdd_includes.h>
#include <wlan_hdd_hostapd.h>
#include <net/cfg80211.h>
#include "sme_Api.h"
#include "wlan_hdd_p2p.h"
#include "sapApi.h"
#include "wlan_hdd_main.h"

#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <net/ieee80211_radiotap.h>
#ifdef FEATURE_WLAN_TDLS
#include "wlan_hdd_tdls.h"
#endif

//Ms to Micro Sec
#define MS_TO_MUS(x)   ((x)*1000);

#ifdef WLAN_FEATURE_P2P_DEBUG
#define MAX_P2P_ACTION_FRAME_TYPE 9
const char *p2p_action_frame_type[]={"GO Negotiation Request",
                                     "GO Negotiation Response",
                                     "GO Negotiation Confirmation",
                                     "P2P Invitation Request",
                                     "P2P Invitation Response",
                                     "Device Discoverability Request",
                                     "Device Discoverability Response",
                                     "Provision Discovery Request",
                                     "Provision Discovery Response"};

/* We no need to protect this variable since
 * there is no chance of race to condition
 * and also not make any complicating the code
 * just for debugging log
 */
tP2PConnectionStatus globalP2PConnectionStatus = P2P_NOT_ACTIVE;

#endif
#ifdef WLAN_FEATURE_TDLS_DEBUG
#define MAX_TDLS_ACTION_FRAME_TYPE 11
const char *tdls_action_frame_type[] = {"TDLS Setup Request",
                                        "TDLS Setup Response",
                                        "TDLS Setup Confirm",
                                        "TDLS Teardown",
                                        "TDLS Peer Traffic Indication",
                                        "TDLS Channel Switch Request",
                                        "TDLS Channel Switch Response",
                                        "TDLS Peer PSM Request",
                                        "TDLS Peer PSM Response",
                                        "TDLS Peer Traffic Response",
                                        "TDLS Discovery Request" };
#endif

extern struct net_device_ops net_ops_struct;

static int hdd_wlan_add_rx_radiotap_hdr( struct sk_buff *skb,
                                         int rtap_len, int flag );

static void hdd_wlan_tx_complete( hdd_adapter_t* pAdapter,
                                  hdd_cfg80211_state_t* cfgState,
                                  tANI_BOOLEAN actionSendSuccess );

static void hdd_sendMgmtFrameOverMonitorIface( hdd_adapter_t *pMonAdapter,
                                               tANI_U32 nFrameLength, 
                                               tANI_U8* pbFrames,
                                               tANI_U8 frameType );

eHalStatus wlan_hdd_remain_on_channel_callback( tHalHandle hHal, void* pCtx,
                                                eHalStatus status )
{
    hdd_adapter_t *pAdapter = (hdd_adapter_t*) pCtx;
    hdd_cfg80211_state_t *cfgState = WLAN_HDD_GET_CFG_STATE_PTR( pAdapter );
    hdd_remain_on_chan_ctx_t *pRemainChanCtx = cfgState->remain_on_chan_ctx;

    if( pRemainChanCtx == NULL )
    {
       hddLog( LOGW,
          "%s: No Rem on channel pending for which Rsp is received", __func__);
       return eHAL_STATUS_SUCCESS;
    }

    hddLog( LOG1, "Received remain on channel rsp");

    cfgState->remain_on_chan_ctx = NULL;

    if( REMAIN_ON_CHANNEL_REQUEST == pRemainChanCtx->rem_on_chan_request )
    {
        if( cfgState->buf )
        {
           hddLog( LOGP, 
                   "%s: We need to receive yet an ack from one of tx packet",
                   __func__);
        }
        cfg80211_remain_on_channel_expired(
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
                              pRemainChanCtx->dev->ieee80211_ptr,
#else
                              pRemainChanCtx->dev,
#endif
                              pRemainChanCtx->cookie,
                              &pRemainChanCtx->chan,
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0))
                              pRemainChanCtx->chan_type,
#endif
                              GFP_KERNEL);
    }


    if ( ( WLAN_HDD_INFRA_STATION == pAdapter->device_mode ) ||
         ( WLAN_HDD_P2P_CLIENT == pAdapter->device_mode ) ||
         ( WLAN_HDD_P2P_DEVICE == pAdapter->device_mode )
       )
    {
        tANI_U8 sessionId = pAdapter->sessionId;
        if( REMAIN_ON_CHANNEL_REQUEST == pRemainChanCtx->rem_on_chan_request )
        {
            sme_DeregisterMgmtFrame(
                       hHal, sessionId,
                      (SIR_MAC_MGMT_FRAME << 2) | ( SIR_MAC_MGMT_PROBE_REQ << 4),
                       NULL, 0 );
        }
    }
    else if ( ( WLAN_HDD_SOFTAP== pAdapter->device_mode ) ||
              ( WLAN_HDD_P2P_GO == pAdapter->device_mode )
            )
    {
        WLANSAP_DeRegisterMgmtFrame(
                (WLAN_HDD_GET_CTX(pAdapter))->pvosContext,
                (SIR_MAC_MGMT_FRAME << 2) | ( SIR_MAC_MGMT_PROBE_REQ << 4),
                NULL, 0 );
    }

    vos_mem_free( pRemainChanCtx );
    complete(&pAdapter->cancel_rem_on_chan_var);
    return eHAL_STATUS_SUCCESS;
}

void wlan_hdd_cancel_existing_remain_on_channel(hdd_adapter_t *pAdapter)
{
    hdd_cfg80211_state_t *cfgState = WLAN_HDD_GET_CFG_STATE_PTR( pAdapter );
    int status = 0;

    if(cfgState->remain_on_chan_ctx != NULL)
    {
        hddLog( LOG1, "Cancel Existing Remain on Channel");

        /* Wait till remain on channel ready indication before issuing cancel 
         * remain on channel request, otherwise if remain on channel not 
         * received and if the driver issues cancel remain on channel then lim 
         * will be in unknown state.
         */
        status = wait_for_completion_interruptible_timeout(&pAdapter->rem_on_chan_ready_event,
               msecs_to_jiffies(WAIT_REM_CHAN_READY));
        if (!status)
        {
            hddLog( LOGE, 
                    "%s: timeout waiting for remain on channel ready indication",
                    __func__);
        }

        INIT_COMPLETION(pAdapter->cancel_rem_on_chan_var);
        
        /* Issue abort remain on chan request to sme.
         * The remain on channel callback will make sure the remain_on_chan
         * expired event is sent.
        */
        if ( ( WLAN_HDD_INFRA_STATION == pAdapter->device_mode ) ||
             ( WLAN_HDD_P2P_CLIENT == pAdapter->device_mode ) ||
             ( WLAN_HDD_P2P_DEVICE == pAdapter->device_mode )
           )
        {
            sme_CancelRemainOnChannel( WLAN_HDD_GET_HAL_CTX( pAdapter ),
                                                     pAdapter->sessionId );
        }
        else if ( (WLAN_HDD_SOFTAP== pAdapter->device_mode) ||
                  (WLAN_HDD_P2P_GO == pAdapter->device_mode)
                )
        {
            WLANSAP_CancelRemainOnChannel(
                                     (WLAN_HDD_GET_CTX(pAdapter))->pvosContext);
        }

        status = wait_for_completion_interruptible_timeout(&pAdapter->cancel_rem_on_chan_var,
               msecs_to_jiffies(WAIT_CANCEL_REM_CHAN));

        if (!status)
        {
            hddLog( LOGE, 
                    "%s: timeout waiting for cancel remain on channel ready indication",
                    __func__);
        }
    }
}

int wlan_hdd_check_remain_on_channel(hdd_adapter_t *pAdapter)
{
   int status = 0;
   hdd_cfg80211_state_t *cfgState = WLAN_HDD_GET_CFG_STATE_PTR( pAdapter );

   if(WLAN_HDD_P2P_GO != pAdapter->device_mode)
   {
     //Cancel Existing Remain On Channel
     //If no action frame is pending
     if( cfgState->remain_on_chan_ctx != NULL)
     {
        //Check whether Action Frame is pending or not
        if( cfgState->buf == NULL)
        {
           wlan_hdd_cancel_existing_remain_on_channel(pAdapter);
        }
        else
        {
           hddLog( LOG1, "Cannot Cancel Existing Remain on Channel");
           status = -EBUSY;
        }
     }
   }
   return status;
}

static int wlan_hdd_request_remain_on_channel( struct wiphy *wiphy,
                                   struct net_device *dev,
                                   struct ieee80211_channel *chan,
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0))
                                   enum nl80211_channel_type channel_type,
#endif
                                   unsigned int duration, u64 *cookie,
                                   rem_on_channel_request_type_t request_type )
{
    hdd_adapter_t *pAdapter = WLAN_HDD_GET_PRIV_PTR(dev);
    hdd_remain_on_chan_ctx_t *pRemainChanCtx;
    hdd_cfg80211_state_t *cfgState = WLAN_HDD_GET_CFG_STATE_PTR( pAdapter );
    hddLog(VOS_TRACE_LEVEL_INFO, "%s: device_mode = %d",
                                 __func__,pAdapter->device_mode);

#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0))
    hddLog( LOG1,
        "chan(hw_val)0x%x chan(centerfreq) %d chan type 0x%x, duration %d",
        chan->hw_value, chan->center_freq, channel_type, duration );
#else
    hddLog( LOG1,
        "chan(hw_val)0x%x chan(centerfreq) %d, duration %d",
        chan->hw_value, chan->center_freq, duration );
#endif
    //Cancel existing remain On Channel if any
    wlan_hdd_cancel_existing_remain_on_channel(pAdapter);

    /* When P2P-GO and if we are trying to unload the driver then
     * wlan driver is keep on receiving the remain on channel command
     * and which is resulting in crash. So not allowing any remain on
     * channel requets when Load/Unload is in progress*/
    if (((hdd_context_t*)pAdapter->pHddCtx)->isLoadUnloadInProgress)
    {
        hddLog( LOGE,
                "%s: Wlan Load/Unload is in progress", __func__);
        return -EBUSY;
    }

    if (((hdd_context_t*)pAdapter->pHddCtx)->isLogpInProgress)
    {
        VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                "%s:LOGP in Progress. Ignore!!!", __func__);
        return -EAGAIN;
    }
    pRemainChanCtx = vos_mem_malloc( sizeof(hdd_remain_on_chan_ctx_t) );
    if( NULL == pRemainChanCtx )
    {
        hddLog(VOS_TRACE_LEVEL_FATAL,
             "%s: Not able to allocate memory for Channel context",
                                         __func__);
        return -ENOMEM;
    }

    vos_mem_copy( &pRemainChanCtx->chan, chan,
                   sizeof(struct ieee80211_channel) );

#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0))
    pRemainChanCtx->chan_type = channel_type;
#endif
    pRemainChanCtx->duration = duration;
    pRemainChanCtx->dev = dev;
    *cookie = (uintptr_t) pRemainChanCtx;
    pRemainChanCtx->cookie = *cookie;
    pRemainChanCtx->rem_on_chan_request = request_type;
    cfgState->remain_on_chan_ctx = pRemainChanCtx;
    cfgState->current_freq = chan->center_freq;
    
    INIT_COMPLETION(pAdapter->rem_on_chan_ready_event);

    //call sme API to start remain on channel.
    if ( ( WLAN_HDD_INFRA_STATION == pAdapter->device_mode ) ||
         ( WLAN_HDD_P2P_CLIENT == pAdapter->device_mode ) ||
         ( WLAN_HDD_P2P_DEVICE == pAdapter->device_mode )
       )
    {
        tANI_U8 sessionId = pAdapter->sessionId;
        //call sme API to start remain on channel.
        sme_RemainOnChannel(
                       WLAN_HDD_GET_HAL_CTX(pAdapter), sessionId,
                       chan->hw_value, duration,
                       wlan_hdd_remain_on_channel_callback, pAdapter,
                       (tANI_U8)(request_type == REMAIN_ON_CHANNEL_REQUEST)? TRUE:FALSE);

        if( REMAIN_ON_CHANNEL_REQUEST == request_type)
        {
            sme_RegisterMgmtFrame(WLAN_HDD_GET_HAL_CTX(pAdapter),
                                   sessionId, (SIR_MAC_MGMT_FRAME << 2) |
                                  (SIR_MAC_MGMT_PROBE_REQ << 4), NULL, 0 );
        }

    }
    else if ( ( WLAN_HDD_SOFTAP== pAdapter->device_mode ) ||
              ( WLAN_HDD_P2P_GO == pAdapter->device_mode )
            )
    {
        //call sme API to start remain on channel.
        if (VOS_STATUS_SUCCESS != WLANSAP_RemainOnChannel(
                          (WLAN_HDD_GET_CTX(pAdapter))->pvosContext,
                          chan->hw_value, duration,
                          wlan_hdd_remain_on_channel_callback, pAdapter ))

        {
           VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                    "%s: WLANSAP_RemainOnChannel returned fail", __func__);
           cfgState->remain_on_chan_ctx = NULL;
           vos_mem_free (pRemainChanCtx);
           return -EINVAL;
        }


        if (VOS_STATUS_SUCCESS != WLANSAP_RegisterMgmtFrame(
                    (WLAN_HDD_GET_CTX(pAdapter))->pvosContext,
                    (SIR_MAC_MGMT_FRAME << 2) | ( SIR_MAC_MGMT_PROBE_REQ << 4),
                    NULL, 0 ))
        {
            VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                    "%s: WLANSAP_RegisterMgmtFrame returned fail", __func__);
            WLANSAP_CancelRemainOnChannel(
                    (WLAN_HDD_GET_CTX(pAdapter))->pvosContext);
            return -EINVAL;
        }

    }
    return 0;

}

int wlan_hdd_cfg80211_remain_on_channel( struct wiphy *wiphy,
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
                                struct wireless_dev *wdev,
#else
                                struct net_device *dev,
#endif
                                struct ieee80211_channel *chan,
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0))
                                enum nl80211_channel_type channel_type,
#endif
                                unsigned int duration, u64 *cookie )
{
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
    struct net_device *dev = wdev->netdev;
#endif
    return wlan_hdd_request_remain_on_channel(wiphy, dev,
                                        chan,
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0))
                                        channel_type,
#endif
                                        duration, cookie,
                                        REMAIN_ON_CHANNEL_REQUEST);
}

void hdd_remainChanReadyHandler( hdd_adapter_t *pAdapter )
{
    hdd_cfg80211_state_t *cfgState = WLAN_HDD_GET_CFG_STATE_PTR( pAdapter );
    hdd_remain_on_chan_ctx_t* pRemainChanCtx = cfgState->remain_on_chan_ctx;

    hddLog( LOG1, "Ready on chan ind");

    if( pRemainChanCtx != NULL )
    {
        if( REMAIN_ON_CHANNEL_REQUEST == pRemainChanCtx->rem_on_chan_request )
        {
            cfg80211_ready_on_channel(
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
                               pAdapter->dev->ieee80211_ptr,
#else
                               pAdapter->dev,
#endif
                               (uintptr_t)pRemainChanCtx,
                               &pRemainChanCtx->chan,
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0))
                               pRemainChanCtx->chan_type,
#endif
                               pRemainChanCtx->duration, GFP_KERNEL );
        }
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38))
        else if( OFF_CHANNEL_ACTION_TX == pRemainChanCtx->rem_on_chan_request )
        {
            complete(&pAdapter->offchannel_tx_event);
        }
#endif
        complete(&pAdapter->rem_on_chan_ready_event);
    }
    else
    {
        hddLog( LOGW, "%s: No Pending Remain on channel Request", __func__);
    }
    return;
}

int wlan_hdd_cfg80211_cancel_remain_on_channel( struct wiphy *wiphy,
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
                                                struct wireless_dev *wdev,
#else
                                                struct net_device *dev,
#endif
                                                u64 cookie )
{
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
    struct net_device *dev = wdev->netdev;
#endif
    hdd_adapter_t *pAdapter = WLAN_HDD_GET_PRIV_PTR(dev);
    hdd_cfg80211_state_t *cfgState = WLAN_HDD_GET_CFG_STATE_PTR( pAdapter );
    hdd_context_t *pHddCtx = WLAN_HDD_GET_CTX( pAdapter );
    int status;

    hddLog( LOG1, "Cancel remain on channel req");

    status = wlan_hdd_validate_context(pHddCtx);

    if (0 != status)
    {
        VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                   "%s: HDD context is not valid", __func__);
        return status;
    }
    /* FIXME cancel currently running remain on chan.
     * Need to check cookie and cancel accordingly
     */
    if( (cfgState->remain_on_chan_ctx == NULL) ||
        (cfgState->remain_on_chan_ctx->cookie != cookie) )
    {
        hddLog( LOGE,
            "%s: No Remain on channel pending with specified cookie value",
             __func__);
        return -EINVAL;
    }

    /* wait until remain on channel ready event received
     * for already issued remain on channel request */
    status = wait_for_completion_interruptible_timeout(&pAdapter->rem_on_chan_ready_event,
            msecs_to_jiffies(WAIT_REM_CHAN_READY));
    if (!status)
    {
        hddLog( LOGE, 
                "%s: timeout waiting for remain on channel ready indication",
                __func__);
    }
    INIT_COMPLETION(pAdapter->cancel_rem_on_chan_var);
    /* Issue abort remain on chan request to sme.
     * The remain on channel callback will make sure the remain_on_chan
     * expired event is sent.
     */
    if ( ( WLAN_HDD_INFRA_STATION == pAdapter->device_mode ) ||
         ( WLAN_HDD_P2P_CLIENT == pAdapter->device_mode ) ||
         ( WLAN_HDD_P2P_DEVICE == pAdapter->device_mode )
       )
    {
        tANI_U8 sessionId = pAdapter->sessionId; 
        sme_CancelRemainOnChannel( WLAN_HDD_GET_HAL_CTX( pAdapter ),
                                            sessionId );
    }
    else if ( (WLAN_HDD_SOFTAP== pAdapter->device_mode) ||
              (WLAN_HDD_P2P_GO == pAdapter->device_mode)
            )
    {
        WLANSAP_CancelRemainOnChannel(
                                (WLAN_HDD_GET_CTX(pAdapter))->pvosContext);
    }
    else 
    {
       hddLog(VOS_TRACE_LEVEL_ERROR, "%s: Invalid device_mode = %d",
                            __func__, pAdapter->device_mode);
       return -EIO;
    }
    wait_for_completion_interruptible_timeout(&pAdapter->cancel_rem_on_chan_var,
            msecs_to_jiffies(WAIT_CANCEL_REM_CHAN));
    return 0;
}

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
int wlan_hdd_action( struct wiphy *wiphy, struct wireless_dev *wdev,
                     struct ieee80211_channel *chan, bool offchan,
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0))
                     enum nl80211_channel_type channel_type,
                     bool channel_type_valid,
#endif
                     unsigned int wait,
                     const u8 *buf, size_t len,  bool no_cck,
                     bool dont_wait_for_ack, u64 *cookie )
#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
int wlan_hdd_action( struct wiphy *wiphy, struct net_device *dev,
                     struct ieee80211_channel *chan, bool offchan,
                     enum nl80211_channel_type channel_type,
                     bool channel_type_valid, unsigned int wait,
                     const u8 *buf, size_t len,  bool no_cck,
                     bool dont_wait_for_ack, u64 *cookie )
#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38))
int wlan_hdd_action( struct wiphy *wiphy, struct net_device *dev,
                     struct ieee80211_channel *chan, bool offchan,
                     enum nl80211_channel_type channel_type,
                     bool channel_type_valid, unsigned int wait,
                     const u8 *buf, size_t len, u64 *cookie )
#else
int wlan_hdd_action( struct wiphy *wiphy, struct net_device *dev,
                     struct ieee80211_channel *chan,
                     enum nl80211_channel_type channel_type,
                     bool channel_type_valid,
                     const u8 *buf, size_t len, u64 *cookie )
#endif //LINUX_VERSION_CODE
{
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
    struct net_device *dev = wdev->netdev;
#endif
    hdd_adapter_t *pAdapter = WLAN_HDD_GET_PRIV_PTR( dev );
    hdd_cfg80211_state_t *cfgState = WLAN_HDD_GET_CFG_STATE_PTR( pAdapter );
    hdd_context_t *pHddCtx = WLAN_HDD_GET_CTX( pAdapter );
    tANI_U16 extendedWait = 0;
    tANI_U8 type = WLAN_HDD_GET_TYPE_FRM_FC(buf[0]);
    tANI_U8 subType = WLAN_HDD_GET_SUBTYPE_FRM_FC(buf[0]);
    tActionFrmType actionFrmType;
    bool noack = 0;
    int status;
#ifdef WLAN_FEATURE_11W
    tANI_U8 *pTxFrmBuf = (tANI_U8 *) buf; // For SA Query, we have to set protect bit
#endif

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38))
    hdd_adapter_t *goAdapter;
#endif

    status = wlan_hdd_validate_context(pHddCtx);

    if (0 != status)
    {
        VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                   "%s: HDD context is not valid", __func__);
        return status;
    }

#ifdef WLAN_FEATURE_P2P_DEBUG
    if ((type == SIR_MAC_MGMT_FRAME) &&
            (subType == SIR_MAC_MGMT_ACTION) &&
            (buf[WLAN_HDD_PUBLIC_ACTION_FRAME_OFFSET] == WLAN_HDD_PUBLIC_ACTION_FRAME))
    {
        actionFrmType = buf[WLAN_HDD_PUBLIC_ACTION_FRAME_TYPE_OFFSET];
        if(actionFrmType >= MAX_P2P_ACTION_FRAME_TYPE)
        {
            hddLog(VOS_TRACE_LEVEL_ERROR,"[P2P] unknown[%d] ---> OTA",
                                   actionFrmType);
        }
        else
        {
            hddLog(VOS_TRACE_LEVEL_ERROR,"[P2P] %s ---> OTA",
            p2p_action_frame_type[actionFrmType]);
            if( (actionFrmType == WLAN_HDD_PROV_DIS_REQ) &&
                (globalP2PConnectionStatus == P2P_NOT_ACTIVE) )
            {
                 globalP2PConnectionStatus = P2P_GO_NEG_PROCESS;
                 hddLog(LOGE,"[P2P State]Inactive state to "
                            "GO negotiation progress state");
            }
            else if( (actionFrmType == WLAN_HDD_GO_NEG_CNF) &&
                (globalP2PConnectionStatus == P2P_GO_NEG_PROCESS) )
            {
                 globalP2PConnectionStatus = P2P_GO_NEG_COMPLETED;
                 hddLog(LOGE,"[P2P State]GO nego progress to GO nego"
                             " completed state");
            }
        }
    }
#endif

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
    noack = dont_wait_for_ack;
#endif

    //If the wait is coming as 0 with off channel set
    //then set the wait to 200 ms
    if (offchan && !wait)
        wait = ACTION_FRAME_DEFAULT_WAIT;

    hddLog(VOS_TRACE_LEVEL_INFO, "%s: device_mode = %d",
                            __func__,pAdapter->device_mode);

    //Call sme API to send out a action frame.
    // OR can we send it directly through data path??
    // After tx completion send tx status back.
    if ( ( WLAN_HDD_SOFTAP == pAdapter->device_mode ) ||
         ( WLAN_HDD_P2P_GO == pAdapter->device_mode )
       )
    {
        if (type == SIR_MAC_MGMT_FRAME)
        {
            if (subType == SIR_MAC_MGMT_PROBE_RSP)
            {
                /* Drop Probe response recieved from supplicant, as for GO and 
                   SAP PE itself sends probe response
                   */ 
                goto err_rem_channel;
            }
            else if ((subType == SIR_MAC_MGMT_DISASSOC) ||
                    (subType == SIR_MAC_MGMT_DEAUTH))
            {
                /* During EAP failure or P2P Group Remove supplicant
                 * is sending del_station command to driver. From
                 * del_station function, Driver will send deauth frame to
                 * p2p client. No need to send disassoc frame from here.
                 * so Drop the frame here and send tx indication back to
                 * supplicant.
                 */
                tANI_U8 dstMac[ETH_ALEN] = {0};
                memcpy(&dstMac, &buf[WLAN_HDD_80211_FRM_DA_OFFSET], ETH_ALEN);
                hddLog(VOS_TRACE_LEVEL_INFO,
                        "%s: Deauth/Disassoc received for STA:"
                        MAC_ADDRESS_STR,
                        __func__,
                        MAC_ADDR_ARRAY(dstMac));
                goto err_rem_channel;
            }
        }
    }

    if( NULL != cfgState->buf )
    {
        if ( !noack )
        {
            hddLog( LOGE, "(%s):Previous P2P Action frame packet pending",
                          __func__);
            hdd_cleanup_actionframe(pAdapter->pHddCtx, pAdapter);
        }
        else
        {
            hddLog( LOGE, "(%s):Pending Action frame packet return EBUSY",
                          __func__);
            return -EBUSY;
        }
    }

    hddLog( LOG1, "Action frame tx request");

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38))
    goAdapter = hdd_get_adapter( pAdapter->pHddCtx, WLAN_HDD_P2P_GO );

    //If GO adapter exists and operating on same frequency
    //then we will not request remain on channel
    if( goAdapter && ( ieee80211_frequency_to_channel(chan->center_freq)
                         == goAdapter->sessionCtx.ap.operatingChannel ) )
    {
        goto send_frame;
    }
#endif

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38))
    if( offchan && wait)
    {
        int status;

        // In case of P2P Client mode if we are already
        // on the same channel then send the frame directly

        if((cfgState->remain_on_chan_ctx != NULL) &&
           (cfgState->current_freq == chan->center_freq)
          )
        {
            hddLog(LOG1,"action frame: extending the wait time\n");
            extendedWait = (tANI_U16)wait;
            goto send_frame;
        }
        remain_on_channel:
        INIT_COMPLETION(pAdapter->offchannel_tx_event);

        status = wlan_hdd_request_remain_on_channel(wiphy, dev,
                                        chan,
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0))
                                        channel_type,
#endif
                                        wait, cookie,
                                        OFF_CHANNEL_ACTION_TX);

        if(0 != status)
        {
            if( (-EBUSY == status) &&
                (cfgState->current_freq == chan->center_freq) )
            {
                goto send_frame;
            }
            goto err_rem_channel;
        }
        /* This will extend timer in LIM when sending Any action frame
         * It will cover remain on channel timer till next action frame
         * in rx direction.
         */
        extendedWait = (tANI_U16)wait;
        /* Wait for driver to be ready on the requested channel */
        status = wait_for_completion_interruptible_timeout(
                     &pAdapter->offchannel_tx_event,
                     msecs_to_jiffies(WAIT_CHANGE_CHANNEL_FOR_OFFCHANNEL_TX));
        if(!status)
        {
            hddLog( LOGE, "Not able to complete remain on channel request"
                          " within timeout period");
            goto err_rem_channel;
        }
    }
    else if ( offchan )
    {
        /* Check before sending action frame
           whether we already remain on channel */
        if(NULL == cfgState->remain_on_chan_ctx)
        {
            goto err_rem_channel;
        }
    }
    send_frame:
#endif

    if(!noack)
    {
        cfgState->buf = vos_mem_malloc( len ); //buf;
        if( cfgState->buf == NULL )
            return -ENOMEM;

        cfgState->len = len;

        vos_mem_copy( cfgState->buf, buf, len);

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38))
        if( cfgState->remain_on_chan_ctx )
        {
            cfgState->action_cookie = cfgState->remain_on_chan_ctx->cookie;
            *cookie = cfgState->action_cookie;
        }
        else
        {
#endif
            *cookie = (uintptr_t) cfgState->buf;
            cfgState->action_cookie = *cookie;
            /*There is race between expiration of remain on channel
              in driver and also sending an action frame in wlan_hdd_action.
              As the remain on chan context is NULL here , which means
              LIM remain on channel timer expired and
              wlan_hdd_remain_on_channel_callback has cleared
              cfgState->remain_on_chan_ctx to NULL so let's
              do a fresh remain on channel.
            */
            goto remain_on_channel;
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38))
        }
#endif
    } 

    if ( (WLAN_HDD_INFRA_STATION == pAdapter->device_mode) ||
         (WLAN_HDD_P2P_CLIENT == pAdapter->device_mode) ||
         ( WLAN_HDD_P2P_DEVICE == pAdapter->device_mode )
       )
    {
        tANI_U8 sessionId = pAdapter->sessionId;

        if ((type == SIR_MAC_MGMT_FRAME) &&
                (subType == SIR_MAC_MGMT_ACTION) &&
                (buf[WLAN_HDD_PUBLIC_ACTION_FRAME_OFFSET] == WLAN_HDD_PUBLIC_ACTION_FRAME))
        {
            actionFrmType = buf[WLAN_HDD_PUBLIC_ACTION_FRAME_TYPE_OFFSET];
            hddLog(LOG1, "Tx Action Frame %u \n", actionFrmType);
            if (actionFrmType == WLAN_HDD_PROV_DIS_REQ)
            {
                cfgState->actionFrmState = HDD_PD_REQ_ACK_PENDING;
                hddLog(LOG1, "%s: HDD_PD_REQ_ACK_PENDING \n", __func__);
            }
            else if (actionFrmType == WLAN_HDD_GO_NEG_REQ)
            {
                cfgState->actionFrmState = HDD_GO_NEG_REQ_ACK_PENDING;
                hddLog(LOG1, "%s: HDD_GO_NEG_REQ_ACK_PENDING \n", __func__);
            }
        }
#ifdef WLAN_FEATURE_11W
        if ((type == SIR_MAC_MGMT_FRAME) &&
                (subType == SIR_MAC_MGMT_ACTION) &&
                (buf[WLAN_HDD_PUBLIC_ACTION_FRAME_OFFSET] == WLAN_HDD_SA_QUERY_ACTION_FRAME))
        {
            VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                     "%s: Calling sme_sendAction. For Category %s", __func__, "SA Query");
            // Since this is an SA Query Action Frame, we have to protect it
            WLAN_HDD_SET_WEP_FRM_FC(pTxFrmBuf[1]);
        }
#endif
        if (eHAL_STATUS_SUCCESS !=
               sme_sendAction( WLAN_HDD_GET_HAL_CTX(pAdapter),
                               sessionId, buf, len, extendedWait, noack))
        {
            VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                     "%s: sme_sendAction returned fail", __func__);
            goto err;
        }
    }
    else if( ( WLAN_HDD_SOFTAP== pAdapter->device_mode ) ||
              ( WLAN_HDD_P2P_GO == pAdapter->device_mode )
            )
     {
        if( VOS_STATUS_SUCCESS !=
             WLANSAP_SendAction( (WLAN_HDD_GET_CTX(pAdapter))->pvosContext,
                                  buf, len, 0 ) )
        {
            VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                    "%s: WLANSAP_SendAction returned fail", __func__);
            goto err;
        }
    }

    return 0;
err:
    if(!noack)
    {
       hdd_sendActionCnf( pAdapter, FALSE );
    }
    return 0;
err_rem_channel:
    *cookie = (uintptr_t)cfgState;
    cfg80211_mgmt_tx_status(
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
                            pAdapter->dev->ieee80211_ptr,
#else
                            pAdapter->dev,
#endif
                            *cookie, buf, len, FALSE, GFP_KERNEL );
    return 0;
}

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38))
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
int wlan_hdd_cfg80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
                                          struct wireless_dev *wdev,
                                          u64 cookie)
{
    return wlan_hdd_cfg80211_cancel_remain_on_channel( wiphy, wdev, cookie );
}
#else
int wlan_hdd_cfg80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
                                          struct net_device *dev,
                                          u64 cookie)
{
    return wlan_hdd_cfg80211_cancel_remain_on_channel( wiphy, dev, cookie );
}
#endif
#endif

void hdd_sendActionCnf( hdd_adapter_t *pAdapter, tANI_BOOLEAN actionSendSuccess )
{
    hdd_cfg80211_state_t *cfgState = WLAN_HDD_GET_CFG_STATE_PTR( pAdapter );

    cfgState->actionFrmState = HDD_IDLE;

    hddLog( LOG1, "Send Action cnf, actionSendSuccess %d", actionSendSuccess);
    if( NULL == cfgState->buf )
    {
        return;
    }

    /* If skb is NULL it means this packet was received on CFG80211 interface
     * else it was received on Monitor interface */
    if( cfgState->skb == NULL )
    {
        /*
         * buf is the same pointer it passed us to send. Since we are sending
         * it through control path, we use different buffers.
         * In case of mac80211, they just push it to the skb and pass the same
         * data while sending tx ack status.
         * */
         cfg80211_mgmt_tx_status(
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
                pAdapter->dev->ieee80211_ptr,
#else
                pAdapter->dev,
#endif
                cfgState->action_cookie,
                cfgState->buf, cfgState->len, actionSendSuccess, GFP_KERNEL );
         vos_mem_free( cfgState->buf );
         cfgState->buf = NULL;
    }
    else
    {
        hdd_adapter_t* pMonAdapter =
                    hdd_get_adapter( pAdapter->pHddCtx, WLAN_HDD_MONITOR );
        if( pMonAdapter == NULL )
        {
            hddLog( LOGE, "Not able to get Monitor Adapter");
            cfgState->skb = NULL;
            vos_mem_free( cfgState->buf );
            cfgState->buf = NULL;
            complete(&pAdapter->tx_action_cnf_event);
            return;
        }
        /* Send TX completion feedback over monitor interface. */
        hdd_wlan_tx_complete( pMonAdapter, cfgState, actionSendSuccess );
        cfgState->skb = NULL;
        vos_mem_free( cfgState->buf );
        cfgState->buf = NULL;
        /* Look for the next Mgmt packet to TX */
        hdd_mon_tx_mgmt_pkt(pAdapter);
    }
    complete(&pAdapter->tx_action_cnf_event);
}

/**
 * hdd_setP2pNoa
 *
 *FUNCTION:
 * This function is called from hdd_hostapd_ioctl function when Driver 
 * get P2P_SET_NOA comand from wpa_supplicant using private ioctl
 *
 *LOGIC:
 * Fill NoA Struct According to P2P Power save Option and Pass it to SME layer 
 *
 *ASSUMPTIONS:
 *
 *
 *NOTE:
 *
 * @param  dev         Pointer to net device structure
 * @param  command     Pointer to command 
 *
 * @return Status
 */

int hdd_setP2pNoa( struct net_device *dev, tANI_U8 *command )
{
    hdd_adapter_t *pAdapter = WLAN_HDD_GET_PRIV_PTR(dev);
    tHalHandle hHal = WLAN_HDD_GET_HAL_CTX(pAdapter);
    VOS_STATUS status = VOS_STATUS_SUCCESS;
    tP2pPsConfig NoA;
    int count, duration, start_time;
    char *param;
    tANI_U8 ret = 0;

    param = strnchr(command, strlen(command), ' ');
    if (param == NULL)
      return -EINVAL;
    param++;
    ret = sscanf(param, "%d %d %d", &count, &start_time, &duration);
    if (ret < 3)
    {
        VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
               "%s: P2P_SET GO NoA: fail to read param "
               "count=%d duration=%d interval=%d \n",
                __func__, count, start_time, duration);
        return -EINVAL;
    }
    VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO,
               "%s: P2P_SET GO NoA: count=%d duration=%d interval=%d \n",
                __func__, count, start_time, duration);
    duration = MS_TO_MUS(duration);
    /* PS Selection
     * Periodic NoA (2)
     * Single NOA   (4)
     */
    NoA.opp_ps = 0;
    NoA.ctWindow = 0;
    if (count == 1)
    {
        NoA.duration = 0;
        NoA.single_noa_duration = duration;
        NoA.psSelection = P2P_POWER_SAVE_TYPE_SINGLE_NOA;
    }
    else
    {
        NoA.duration = duration;
        NoA.single_noa_duration = 0;
        NoA.psSelection = P2P_POWER_SAVE_TYPE_PERIODIC_NOA;
    }
    NoA.interval = MS_TO_MUS(100);
    NoA.count = count;
    NoA.sessionid = pAdapter->sessionId;

    VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO,
                "%s: P2P_PS_ATTR:oppPS %d ctWindow %d duration %d "
                "interval %d count %d single noa duration %d "
                "PsSelection %x \n", __func__, NoA.opp_ps, 
                NoA.ctWindow, NoA.duration, NoA.interval, 
                NoA.count, NoA.single_noa_duration,
                NoA.psSelection);

    sme_p2pSetPs(hHal, &NoA);
    return status;
}

/**
 * hdd_setP2pOpps
 *
 *FUNCTION:
 * This function is called from hdd_hostapd_ioctl function when Driver
 * get P2P_SET_PS comand from wpa_supplicant using private ioctl
 *
 *LOGIC:
 * Fill NoA Struct According to P2P Power save Option and Pass it to SME layer
 *
 *ASSUMPTIONS:
 *
 *
 *NOTE:
 *
 * @param  dev         Pointer to net device structure
 * @param  command     Pointer to command
 *
 * @return Status
 */

int hdd_setP2pOpps( struct net_device *dev, tANI_U8 *command )
{
    hdd_adapter_t *pAdapter = WLAN_HDD_GET_PRIV_PTR(dev);
    tHalHandle hHal = WLAN_HDD_GET_HAL_CTX(pAdapter);
    VOS_STATUS status = VOS_STATUS_SUCCESS;
    tP2pPsConfig NoA;
    char *param;
    int legacy_ps, opp_ps, ctwindow;
    tANI_U8 ret = 0;

    param = strnchr(command, strlen(command), ' ');
    if (param == NULL)
        return -EINVAL;
    param++;
    ret = sscanf(param, "%d %d %d", &legacy_ps, &opp_ps, &ctwindow);
    if (ret < 3)
    {
        VOS_TRACE (VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                 "%s: P2P_SET GO PS: fail to read param "
                 " legacy_ps=%d opp_ps=%d ctwindow=%d \n",
                 __func__, legacy_ps, opp_ps, ctwindow);
        return -EINVAL;
    }
    VOS_TRACE (VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO,
                 "%s: P2P_SET GO PS: legacy_ps=%d opp_ps=%d ctwindow=%d \n",
                 __func__, legacy_ps, opp_ps, ctwindow);

    /* PS Selection
     * Opportunistic Power Save (1)
     */

    /* From wpa_cli user need to use separate command to set ctWindow and Opps
     * When user want to set ctWindow during that time other parameters
     * values are coming from wpa_supplicant as -1. 
     * Example : User want to set ctWindow with 30 then wpa_cli command : 
     * P2P_SET ctwindow 30 
     * Command Received at hdd_hostapd_ioctl is as below: 
     * P2P_SET_PS -1 -1 30 (legacy_ps = -1, opp_ps = -1, ctwindow = 30)
     */ 
    if (ctwindow != -1)
    {

        VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO,
                    "Opportunistic Power Save is %s \n", 
                    (TRUE == pAdapter->ops) ? "Enable" : "Disable" );

        if (ctwindow != pAdapter->ctw)
        {
            pAdapter->ctw = ctwindow;
        
            if(pAdapter->ops)
            {
                NoA.opp_ps = pAdapter->ops;
                NoA.ctWindow = pAdapter->ctw;
                NoA.duration = 0;
                NoA.single_noa_duration = 0;
                NoA.interval = 0;
                NoA.count = 0;
                NoA.psSelection = P2P_POWER_SAVE_TYPE_OPPORTUNISTIC;
                NoA.sessionid = pAdapter->sessionId;
 
                VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO,
                            "%s: P2P_PS_ATTR:oppPS %d ctWindow %d duration %d "
                            "interval %d count %d single noa duration %d "
                            "PsSelection %x \n", __func__, NoA.opp_ps, 
                            NoA.ctWindow, NoA.duration, NoA.interval, 
                            NoA.count, NoA.single_noa_duration,
                            NoA.psSelection);

               sme_p2pSetPs(hHal, &NoA);
           }
           return 0;
        }
    }

    if (opp_ps != -1)
    {
        pAdapter->ops = opp_ps;

        if ((opp_ps != -1) && (pAdapter->ctw)) 
        {
            NoA.opp_ps = opp_ps;
            NoA.ctWindow = pAdapter->ctw;
            NoA.duration = 0;
            NoA.single_noa_duration = 0;
            NoA.interval = 0;
            NoA.count = 0;
            NoA.psSelection = P2P_POWER_SAVE_TYPE_OPPORTUNISTIC;
            NoA.sessionid = pAdapter->sessionId;

            VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO,
                        "%s: P2P_PS_ATTR:oppPS %d ctWindow %d duration %d "
                        "interval %d count %d single noa duration %d "
                        "PsSelection %x \n", __func__, NoA.opp_ps, 
                        NoA.ctWindow, NoA.duration, NoA.interval, 
                        NoA.count, NoA.single_noa_duration,
                        NoA.psSelection);

           sme_p2pSetPs(hHal, &NoA);
        }
    }
    return status;
}

int hdd_setP2pPs( struct net_device *dev, void *msgData )
{
    hdd_adapter_t *pAdapter = WLAN_HDD_GET_PRIV_PTR(dev);
    tHalHandle hHal = WLAN_HDD_GET_HAL_CTX(pAdapter);
    VOS_STATUS status = VOS_STATUS_SUCCESS;
    tP2pPsConfig NoA;
    p2p_app_setP2pPs_t *pappNoA = (p2p_app_setP2pPs_t *) msgData;

    NoA.opp_ps = pappNoA->opp_ps;
    NoA.ctWindow = pappNoA->ctWindow;
    NoA.duration = pappNoA->duration;
    NoA.interval = pappNoA->interval;
    NoA.count = pappNoA->count;
    NoA.single_noa_duration = pappNoA->single_noa_duration;
    NoA.psSelection = pappNoA->psSelection;
    NoA.sessionid = pAdapter->sessionId;

    sme_p2pSetPs(hHal, &NoA);
    return status;
}

static tANI_U8 wlan_hdd_get_session_type( enum nl80211_iftype type )
{
    tANI_U8 sessionType;

    switch( type )
    {
        case NL80211_IFTYPE_AP:
            sessionType = WLAN_HDD_SOFTAP;
            break;
        case NL80211_IFTYPE_P2P_GO:
            sessionType = WLAN_HDD_P2P_GO;
            break;
        case NL80211_IFTYPE_P2P_CLIENT:
            sessionType = WLAN_HDD_P2P_CLIENT;
            break;
        case NL80211_IFTYPE_STATION:
            sessionType = WLAN_HDD_INFRA_STATION;
            break;
        case NL80211_IFTYPE_MONITOR:
            sessionType = WLAN_HDD_MONITOR;
            break;
        default:
            sessionType = WLAN_HDD_INFRA_STATION;
            break;
    }

    return sessionType;
}

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,0))
struct wireless_dev* wlan_hdd_add_virtual_intf(
                  struct wiphy *wiphy, const char *name,
                  enum nl80211_iftype type,
                  u32 *flags, struct vif_params *params )
#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
struct wireless_dev* wlan_hdd_add_virtual_intf(
                  struct wiphy *wiphy, char *name, enum nl80211_iftype type,
                  u32 *flags, struct vif_params *params )
#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38))
struct net_device* wlan_hdd_add_virtual_intf(
                  struct wiphy *wiphy, char *name, enum nl80211_iftype type,
                  u32 *flags, struct vif_params *params )
#else
int wlan_hdd_add_virtual_intf( struct wiphy *wiphy, char *name,
                               enum nl80211_iftype type,
                               u32 *flags, struct vif_params *params )
#endif
{
    hdd_context_t *pHddCtx = (hdd_context_t*) wiphy_priv(wiphy);
    hdd_adapter_t* pAdapter = NULL;

    ENTER();

    if(hdd_get_adapter(pHddCtx, wlan_hdd_get_session_type(type)) != NULL)
    {
       hddLog(VOS_TRACE_LEVEL_ERROR,"%s: Interface type %d already exists. Two"
                     "interfaces of same type are not supported currently.",__func__, type);
       return NULL;
    }

    if (pHddCtx->isLogpInProgress)
    {
       VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                "%s:LOGP in Progress. Ignore!!!", __func__);
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38))
       return NULL;
#else
       return -EAGAIN;
#endif
    }
    if (pHddCtx->cfg_ini->isP2pDeviceAddrAdministrated &&
        ((NL80211_IFTYPE_P2P_GO == type) ||
         (NL80211_IFTYPE_P2P_CLIENT == type)))
    {
            /* Generate the P2P Interface Address. this address must be
             * different from the P2P Device Address.
             */
            v_MACADDR_t p2pDeviceAddress = pHddCtx->p2pDeviceAddress;
            p2pDeviceAddress.bytes[4] ^= 0x80;
            pAdapter = hdd_open_adapter( pHddCtx, 
                                         wlan_hdd_get_session_type(type),
                                         name, p2pDeviceAddress.bytes,
                                         VOS_TRUE );
    }
    else
    {
       pAdapter = hdd_open_adapter( pHddCtx, wlan_hdd_get_session_type(type),
                          name, wlan_hdd_get_intf_addr(pHddCtx), VOS_TRUE );
    }

    if( NULL == pAdapter)
    {
        hddLog(VOS_TRACE_LEVEL_ERROR,"%s: hdd_open_adapter failed",__func__);
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38))
        return NULL;
#else
        return -EINVAL;
#endif
    }
    EXIT();
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
    return pAdapter->dev->ieee80211_ptr;
#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38))
    return pAdapter->dev;
#else
    return 0;
#endif
}

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
int wlan_hdd_del_virtual_intf( struct wiphy *wiphy, struct wireless_dev *wdev )
#else
int wlan_hdd_del_virtual_intf( struct wiphy *wiphy, struct net_device *dev )
#endif
{
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
    struct net_device *dev = wdev->netdev;
#endif
    hdd_context_t *pHddCtx = (hdd_context_t*) wiphy_priv(wiphy);
    hdd_adapter_t *pVirtAdapter = WLAN_HDD_GET_PRIV_PTR(dev);
    int status;
    ENTER();

    hddLog(VOS_TRACE_LEVEL_INFO, "%s: device_mode = %d",
           __func__,pVirtAdapter->device_mode);

    status = wlan_hdd_validate_context(pHddCtx);

    if (0 != status)
    {
        VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                   "%s: HDD context is not valid", __func__);
        return status;
    }

    wlan_hdd_release_intf_addr( pHddCtx,
                                 pVirtAdapter->macAddressCurrent.bytes );

    hdd_stop_adapter( pHddCtx, pVirtAdapter );
    hdd_close_adapter( pHddCtx, pVirtAdapter, TRUE );
    EXIT();
    return 0;
}

void hdd_sendMgmtFrameOverMonitorIface( hdd_adapter_t *pMonAdapter,
                                        tANI_U32 nFrameLength,
                                        tANI_U8* pbFrames,
                                        tANI_U8 frameType )  
{
    //Indicate a Frame over Monitor Intf.
    int rxstat;
    struct sk_buff *skb = NULL;
    int needed_headroom = 0;
    int flag = HDD_RX_FLAG_IV_STRIPPED | HDD_RX_FLAG_DECRYPTED |
               HDD_RX_FLAG_MMIC_STRIPPED;
#ifdef WLAN_OPEN_SOURCE
#ifdef WLAN_FEATURE_HOLD_RX_WAKELOCK
    hdd_context_t* pHddCtx = (hdd_context_t*)(pMonAdapter->pHddCtx);
#endif
#endif
    hddLog( LOG1, FL("Indicate Frame over Monitor Intf"));

    if (NULL == pbFrames)
    {
        hddLog(LOGE, FL("NULL frame pointer"));
        return;
    }

    /* room for the radiotap header based on driver features
     * 1 Byte for RADIO TAP Flag, 1 Byte padding and 2 Byte for
     * RX flags.
     * */
     needed_headroom = sizeof(struct ieee80211_radiotap_header) + 4;

     //alloc skb  here
     skb = alloc_skb(VPKT_SIZE_BUFFER, GFP_ATOMIC);
     if (unlikely(NULL == skb))
     {
         hddLog( LOGW, FL("Unable to allocate skb"));
         return;
     }
     skb_reserve(skb, VPKT_SIZE_BUFFER);
     if (unlikely(skb_headroom(skb) < nFrameLength))
     {
         VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_FATAL,
                   "HDD [%d]: Insufficient headroom, "
                   "head[%p], data[%p], req[%d]",
                   __LINE__, skb->head, skb->data, nFrameLength);
         kfree_skb(skb);
         return ;
     }
     // actually push the data
     memcpy(skb_push(skb, nFrameLength), pbFrames, nFrameLength);
     /* prepend radiotap information */
     if( 0 != hdd_wlan_add_rx_radiotap_hdr( skb, needed_headroom, flag ) )
     {
         hddLog( LOGE, FL("Not Able Add Radio Tap"));
         //free skb
         kfree_skb(skb);
         return ;
     }

     skb_reset_mac_header( skb );
     skb->dev = pMonAdapter->dev;
     skb->protocol = eth_type_trans( skb, skb->dev );
     skb->ip_summed = CHECKSUM_NONE;
#ifdef WLAN_OPEN_SOURCE
#ifdef WLAN_FEATURE_HOLD_RX_WAKELOCK
     wake_lock_timeout(&pHddCtx->rx_wake_lock, msecs_to_jiffies(HDD_WAKE_LOCK_DURATION));
#endif
#endif
     rxstat = netif_rx_ni(skb);
     if( NET_RX_SUCCESS == rxstat )
     {
         hddLog( LOG1, FL("Success"));
     }
     else
         hddLog( LOGE, FL("Failed %d"), rxstat);                   

     return ;
}

void hdd_indicateMgmtFrame( hdd_adapter_t *pAdapter,
                            tANI_U32 nFrameLength, 
                            tANI_U8* pbFrames,
                            tANI_U8 frameType,
                            tANI_U32 rxChan,
                            tANI_S8 rxRssi )
{
    tANI_U16 freq;
    tANI_U8 type = 0;
    tANI_U8 subType = 0;
    tActionFrmType actionFrmType;
    hdd_cfg80211_state_t *cfgState = NULL;

    hddLog(VOS_TRACE_LEVEL_INFO, "%s: Frame Type = %d Frame Length = %d\n",
            __func__, frameType, nFrameLength);

    if (NULL == pAdapter)
    {
        hddLog(LOGE, FL("pAdapter is NULL"));
        return;
    }

    if (0 == nFrameLength)
    {
        hddLog(LOGE, FL("Frame Length is Invalid ZERO"));
        return;
    }

    if (NULL == pbFrames)
    {
        hddLog(LOGE, FL("pbFrames is NULL"));
        return;
    }

    type = WLAN_HDD_GET_TYPE_FRM_FC(pbFrames[0]);
    subType = WLAN_HDD_GET_SUBTYPE_FRM_FC(pbFrames[0]);

    /* Get pAdapter from Destination mac address of the frame */
    if ((type == SIR_MAC_MGMT_FRAME) &&
            (subType != SIR_MAC_MGMT_PROBE_REQ))
    {
         pAdapter = hdd_get_adapter_by_macaddr( WLAN_HDD_GET_CTX(pAdapter),
                            &pbFrames[WLAN_HDD_80211_FRM_DA_OFFSET]);
         if (NULL == pAdapter)
         {
             /* Under assumtion that we don't receive any action frame
              * with BCST as destination we dropping action frame
              */
             hddLog(VOS_TRACE_LEVEL_FATAL,"pAdapter for action frame is NULL Macaddr = "
                               MAC_ADDRESS_STR ,
                               MAC_ADDR_ARRAY(&pbFrames[WLAN_HDD_80211_FRM_DA_OFFSET]));
             hddLog(VOS_TRACE_LEVEL_FATAL, "%s: Frame Type = %d Frame Length = %d"
                              " subType = %d \n",__func__,frameType,nFrameLength,subType);
             return;
         }
    }


    if (NULL == pAdapter->dev)
    {
        hddLog( LOGE, FL("pAdapter->dev is NULL"));
        return;
    }

    if (WLAN_HDD_ADAPTER_MAGIC != pAdapter->magic)
    {
        hddLog( LOGE, FL("pAdapter has invalid magic"));
        return;
    }

    if ((WLAN_HDD_SOFTAP == pAdapter->device_mode) ||
        (WLAN_HDD_P2P_GO == pAdapter->device_mode ))
    {
        hdd_adapter_t *pMonAdapter =
            hdd_get_mon_adapter( WLAN_HDD_GET_CTX(pAdapter) );

        if (NULL != pMonAdapter)
        {
            hddLog( LOG1, FL("Indicate Frame over Monitor Interface"));
            hdd_sendMgmtFrameOverMonitorIface( pMonAdapter, nFrameLength,
                    pbFrames, frameType);
            return;
        }
    }

    //Channel indicated may be wrong. TODO
    //Indicate an action frame.
    if( rxChan <= MAX_NO_OF_2_4_CHANNELS )
    {
        freq = ieee80211_channel_to_frequency( rxChan,
                IEEE80211_BAND_2GHZ);
    }
    else
    {
        freq = ieee80211_channel_to_frequency( rxChan,
                IEEE80211_BAND_5GHZ);
    }

    cfgState = WLAN_HDD_GET_CFG_STATE_PTR( pAdapter );
    
    if ((type == SIR_MAC_MGMT_FRAME) && 
        (subType == SIR_MAC_MGMT_ACTION))
    {
        if(pbFrames[WLAN_HDD_PUBLIC_ACTION_FRAME_OFFSET] == WLAN_HDD_PUBLIC_ACTION_FRAME)
        {
            // public action frame
            if((pbFrames[WLAN_HDD_PUBLIC_ACTION_FRAME_OFFSET+1] == SIR_MAC_ACTION_VENDOR_SPECIFIC) &&
                vos_mem_compare(&pbFrames[WLAN_HDD_PUBLIC_ACTION_FRAME_OFFSET+2], SIR_MAC_P2P_OUI, SIR_MAC_P2P_OUI_SIZE))
            // P2P action frames
            {
                actionFrmType = pbFrames[WLAN_HDD_PUBLIC_ACTION_FRAME_TYPE_OFFSET];
                hddLog(LOG1, "Rx Action Frame %u \n", actionFrmType);
#ifdef WLAN_FEATURE_P2P_DEBUG
                if(actionFrmType >= MAX_P2P_ACTION_FRAME_TYPE)
                {
                    hddLog(VOS_TRACE_LEVEL_ERROR,"[P2P] unknown[%d] <--- OTA",
                                                                actionFrmType);
                }
                else
                {
                    hddLog(VOS_TRACE_LEVEL_ERROR,"[P2P] %s <--- OTA",
                    p2p_action_frame_type[actionFrmType]);
                    if( (actionFrmType == WLAN_HDD_PROV_DIS_REQ) &&
                        (globalP2PConnectionStatus == P2P_NOT_ACTIVE) )
                    {
                         globalP2PConnectionStatus = P2P_GO_NEG_PROCESS;
                         hddLog(LOGE,"[P2P State]Inactive state to "
                           "GO negotiation progress state");
                    }
                    else if( (actionFrmType == WLAN_HDD_GO_NEG_CNF) &&
                        (globalP2PConnectionStatus == P2P_GO_NEG_PROCESS) )
                    {
                         globalP2PConnectionStatus = P2P_GO_NEG_COMPLETED;
                 hddLog(LOGE,"[P2P State]GO negotiation progress to "
                             "GO negotiation completed state");
                    }
                    else if( (actionFrmType == WLAN_HDD_INVITATION_REQ) &&
                        (globalP2PConnectionStatus == P2P_NOT_ACTIVE) )
                    {
                         globalP2PConnectionStatus = P2P_GO_NEG_COMPLETED;
                         hddLog(LOGE,"[P2P State]Inactive state to GO negotiation"
                                     " completed state Autonomous GO formation");
                    }
                }
#endif

                if (((actionFrmType == WLAN_HDD_PROV_DIS_RESP) &&
                            (cfgState->actionFrmState == HDD_PD_REQ_ACK_PENDING)) ||
                        ((actionFrmType == WLAN_HDD_GO_NEG_RESP) &&
                         (cfgState->actionFrmState == HDD_GO_NEG_REQ_ACK_PENDING)))
                {
                    hddLog(LOG1, "%s: ACK_PENDING and But received RESP for Action frame ",
                            __func__);
                    hdd_sendActionCnf(pAdapter, TRUE);
                }
            }
#ifdef FEATURE_WLAN_TDLS
            else if(pbFrames[WLAN_HDD_PUBLIC_ACTION_FRAME_OFFSET+1] == WLAN_HDD_PUBLIC_ACTION_TDLS_DISC_RESP)
            {
                u8 *mac = &pbFrames[WLAN_HDD_80211_FRM_DA_OFFSET+6];
#ifdef WLAN_FEATURE_TDLS_DEBUG
                hddLog(VOS_TRACE_LEVEL_ERROR,"[TDLS] TDLS Discovery Response," MAC_ADDRESS_STR " RSSI[%d] <--- OTA",
                 MAC_ADDR_ARRAY(mac),rxRssi);
#endif
                wlan_hdd_tdls_set_rssi(pAdapter, mac, rxRssi);
                wlan_hdd_tdls_recv_discovery_resp(pAdapter, mac);
            }
#endif
        }
#ifdef WLAN_FEATURE_TDLS_DEBUG
        if(pbFrames[WLAN_HDD_PUBLIC_ACTION_FRAME_OFFSET] == WLAN_HDD_TDLS_ACTION_FRAME)
        {
            actionFrmType = pbFrames[WLAN_HDD_PUBLIC_ACTION_FRAME_OFFSET+1];
            if(actionFrmType >= MAX_TDLS_ACTION_FRAME_TYPE)
            {
                hddLog(VOS_TRACE_LEVEL_ERROR,"[TDLS] unknown[%d] <--- OTA",
                                                            actionFrmType);
            }
            else
            {
                hddLog(VOS_TRACE_LEVEL_ERROR,"[TDLS] %s <--- OTA",
                    tdls_action_frame_type[actionFrmType]);
            }
        }
#endif
    }

    //Indicate Frame Over Normal Interface
    hddLog( LOG1, FL("Indicate Frame over NL80211 Interface"));

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
    cfg80211_rx_mgmt( pAdapter->dev->ieee80211_ptr, freq, 0,
                      pbFrames, nFrameLength,
                      GFP_ATOMIC );
#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
    cfg80211_rx_mgmt( pAdapter->dev, freq, 0,
                      pbFrames, nFrameLength,
                      GFP_ATOMIC );
#else
    cfg80211_rx_mgmt( pAdapter->dev, freq,
                      pbFrames, nFrameLength,
                      GFP_ATOMIC );
#endif //LINUX_VERSION_CODE
}

/*
 * ieee80211_add_rx_radiotap_header - add radiotap header
 */
static int hdd_wlan_add_rx_radiotap_hdr (
             struct sk_buff *skb, int rtap_len, int flag )
{
    u8 rtap_temp[20] = {0};
    struct ieee80211_radiotap_header *rthdr;
    unsigned char *pos;
    u16 rx_flags = 0;

    rthdr = (struct ieee80211_radiotap_header *)(&rtap_temp[0]);

    /* radiotap header, set always present flags */
    rthdr->it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS)   |
                                    (1 << IEEE80211_RADIOTAP_RX_FLAGS));
    rthdr->it_len = cpu_to_le16(rtap_len);

    pos = (unsigned char *) (rthdr + 1);

    /* the order of the following fields is important */

    /* IEEE80211_RADIOTAP_FLAGS */
    *pos = 0;
    pos++;

    /* IEEE80211_RADIOTAP_RX_FLAGS: Length 2 Bytes */
    /* ensure 2 byte alignment for the 2 byte field as required */
    if ((pos - (u8 *)rthdr) & 1)
        pos++;
    put_unaligned_le16(rx_flags, pos);
    pos += 2;
    
    // actually push the data
    memcpy(skb_push(skb, rtap_len), &rtap_temp[0], rtap_len);

    return 0;
}

static void hdd_wlan_tx_complete( hdd_adapter_t* pAdapter,
                                  hdd_cfg80211_state_t* cfgState,
                                  tANI_BOOLEAN actionSendSuccess )
{
    struct ieee80211_radiotap_header *rthdr;
    unsigned char *pos;
    struct sk_buff *skb = cfgState->skb;
#ifdef WLAN_OPEN_SOURCE
#ifdef WLAN_FEATURE_HOLD_RX_WAKELOCK
    hdd_context_t *pHddCtx = (hdd_context_t*)(pAdapter->pHddCtx);
#endif
#endif

    /* 2 Byte for TX flags and 1 Byte for Retry count */
    u32 rtHdrLen = sizeof(*rthdr) + 3;

    u8 *data;

    /* We have to return skb with Data starting with MAC header. We have
     * copied SKB data starting with MAC header to cfgState->buf. We will pull
     * entire skb->len from skb and then we will push cfgState->buf to skb
     * */
    if( NULL == skb_pull(skb, skb->len) )
    {
        hddLog( LOGE, FL("Not Able to Pull %d byte from skb"), skb->len);
        kfree_skb(cfgState->skb);
        return;
    }

    data = skb_push( skb, cfgState->len );

    if (data == NULL)
    {
        hddLog( LOGE, FL("Not Able to Push %zu byte to skb"), cfgState->len);
        kfree_skb( cfgState->skb );
        return;
    }

    memcpy( data, cfgState->buf, cfgState->len );

    /* send frame to monitor interfaces now */
    if( skb_headroom(skb) < rtHdrLen )
    {
        hddLog( LOGE, FL("No headroom for rtap header"));
        kfree_skb(cfgState->skb);
        return;
    }

    rthdr = (struct ieee80211_radiotap_header*) skb_push( skb, rtHdrLen );

    memset( rthdr, 0, rtHdrLen );
    rthdr->it_len = cpu_to_le16( rtHdrLen );
    rthdr->it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
                                    (1 << IEEE80211_RADIOTAP_DATA_RETRIES)
                                   );

    pos = (unsigned char *)( rthdr+1 );

    // Fill TX flags
    *pos = actionSendSuccess;
    pos += 2;

    // Fill retry count
    *pos = 0;
    pos++;

    skb_set_mac_header( skb, 0 );
    skb->ip_summed = CHECKSUM_NONE;
    skb->pkt_type  = PACKET_OTHERHOST;
    skb->protocol  = htons(ETH_P_802_2);
    memset( skb->cb, 0, sizeof( skb->cb ) );
#ifdef WLAN_OPEN_SOURCE
#ifdef WLAN_FEATURE_HOLD_RX_WAKELOCK
    wake_lock_timeout(&pHddCtx->rx_wake_lock, msecs_to_jiffies(HDD_WAKE_LOCK_DURATION));
#endif
#endif
    if (in_interrupt())
        netif_rx( skb );
    else
        netif_rx_ni( skb );

    /* Enable Queues which we have disabled earlier */
    netif_tx_start_all_queues( pAdapter->dev );

}