/*
 * Copyright (c) 2012-2017 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.
 */

#ifdef FEATURE_OEM_DATA_SUPPORT

/*================================================================================
    \file wlan_hdd_oemdata.c

    \brief Linux Wireless Extensions for oem data req/rsp

    $Id: wlan_hdd_oemdata.c,v 1.34 2010/04/15 01:49:23 -- VINAY

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

#include <linux/version.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/wireless.h>
#include <wlan_hdd_includes.h>
#include <net/arp.h>
#include <vos_sched.h>
#include "qwlan_version.h"
#include "vos_utils.h"
#include "wma.h"
#include "wlan_hdd_oemdata.h"
#ifdef CNSS_GENL
#include <net/cnss_nl.h>
#endif

static struct hdd_context_s *pHddCtx;

/**
 * populate_oem_data_cap() - populate oem capabilities
 * @adapter: device adapter
 * @data_cap: pointer to populate the capabilities
 *
 * Return: error code
 */
static int populate_oem_data_cap(hdd_adapter_t *adapter,
				 t_iw_oem_data_cap *data_cap)
{
	VOS_STATUS status;
	hdd_config_t *config;
	uint32_t num_chan;
	uint8_t *chan_list;
	hdd_context_t *hdd_ctx = adapter->pHddCtx;

	config = hdd_ctx->cfg_ini;
	if (!config) {
		hddLog(LOGE, FL("HDD configuration is null"));
		return -EINVAL;
	}
	chan_list = vos_mem_malloc(sizeof(uint8_t) * OEM_CAP_MAX_NUM_CHANNELS);
	if (NULL == chan_list) {
		hddLog(LOGE, FL("Memory allocation failed"));
		return -ENOMEM;
	}

	strlcpy(data_cap->oem_target_signature, OEM_TARGET_SIGNATURE,
		OEM_TARGET_SIGNATURE_LEN);
	data_cap->oem_target_type = hdd_ctx->target_type;
	data_cap->oem_fw_version = hdd_ctx->target_fw_version;
	data_cap->driver_version.major = QWLAN_VERSION_MAJOR;
	data_cap->driver_version.minor = QWLAN_VERSION_MINOR;
	data_cap->driver_version.patch = QWLAN_VERSION_PATCH;
	data_cap->driver_version.build = QWLAN_VERSION_BUILD;
	data_cap->allowed_dwell_time_min = config->nNeighborScanMinChanTime;
	data_cap->allowed_dwell_time_max = config->nNeighborScanMaxChanTime;
	data_cap->curr_dwell_time_min =
		sme_getNeighborScanMinChanTime(hdd_ctx->hHal,
					       adapter->sessionId);
	data_cap->curr_dwell_time_max =
		sme_getNeighborScanMaxChanTime(hdd_ctx->hHal,
					       adapter->sessionId);
	data_cap->supported_bands = config->nBandCapability;

	/* request for max num of channels */
	num_chan = OEM_CAP_MAX_NUM_CHANNELS;
	status = sme_GetCfgValidChannels(hdd_ctx->hHal, &chan_list[0],
					 &num_chan);
	if (VOS_STATUS_SUCCESS != status) {
		hddLog(LOGE, FL("failed to get valid channel list, status: %d"),
			     status);
		vos_mem_free(chan_list);
		return -EINVAL;
	}

	/* make sure num channels is not more than chan list array */
	if (num_chan > OEM_CAP_MAX_NUM_CHANNELS) {
		hddLog(LOGE, FL("Num of channels-%d > length-%d of chan_list"),
			     num_chan, OEM_CAP_MAX_NUM_CHANNELS);
		vos_mem_free(chan_list);
		return -EINVAL;
	}

	data_cap->num_channels = num_chan;
	vos_mem_copy(data_cap->channel_list, chan_list,
		     sizeof(uint8_t) * num_chan);

	vos_mem_free(chan_list);
	return 0;
}

/**---------------------------------------------------------------------------

  \brief iw_get_oem_data_cap()

  This function gets the capability information for OEM Data Request
  and Response.

  \param - dev  - Pointer to the net device
         - info - Pointer to the t_iw_oem_data_cap
         - wrqu - Pointer to the iwreq data
         - extra - Pointer to the data

  \return - 0 for success, non zero for failure

----------------------------------------------------------------------------*/
int iw_get_oem_data_cap(
        struct net_device *dev,
        struct iw_request_info *info,
        union iwreq_data *wrqu,
        char *extra)
{
    int status;
    t_iw_oem_data_cap oemDataCap = { {0} };
    t_iw_oem_data_cap *pHddOemDataCap;
    hdd_adapter_t *pAdapter = netdev_priv(dev);
    hdd_context_t *pHddContext;
    int ret;

    ENTER();

    if (!pAdapter)
    {
       VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                 "%s:Invalid context, pAdapter is null", __func__);
       return -EINVAL;
    }

    pHddContext = WLAN_HDD_GET_CTX(pAdapter);
    ret = wlan_hdd_validate_context(pHddContext);
    if (0 != ret)
      return ret;

    status = populate_oem_data_cap(pAdapter, &oemDataCap);
    if (0 != status) {
        hddLog(LOGE, FL("Failed to populate oem data capabilities"));
        return status;
    }

    pHddOemDataCap = (t_iw_oem_data_cap *) (extra);
    *pHddOemDataCap = oemDataCap;

    EXIT();
    return 0;
}

/**
 * nl_srv_ucast_oem() - Wrapper function to send ucast msgs to OEM
 * @skb: sk buffer pointer
 * @dst_pid: Destination PID
 * @flag: flags
 *
 * Sends the ucast message to OEM with generic nl socket if CNSS_GENL
 * is enabled. Else, use the legacy netlink socket to send.
 *
 * Return: None
 */
static void nl_srv_ucast_oem(struct sk_buff *skb, int dst_pid, int flag)
{
#ifdef CNSS_GENL
	nl_srv_ucast(skb, dst_pid, flag, WLAN_NL_MSG_OEM,
					CLD80211_MCGRP_OEM_MSGS);
#else
	nl_srv_ucast(skb, dst_pid, flag);
#endif
}
/**---------------------------------------------------------------------------

  \brief send_oem_reg_rsp_nlink_msg() - send oem registration response

  This function sends oem message to registered application process

  \param -
     - none

  \return - none

  --------------------------------------------------------------------------*/
static void send_oem_reg_rsp_nlink_msg(void)
{
   struct sk_buff *skb;
   struct nlmsghdr *nlh;
   tAniMsgHdr *aniHdr;
   tANI_U8 *buf;
   tANI_U8 *numInterfaces;
   tANI_U8 *deviceMode;
   tANI_U8 *vdevId;
   hdd_adapter_list_node_t *pAdapterNode = NULL;
   hdd_adapter_list_node_t *pNext = NULL;
   hdd_adapter_t *pAdapter = NULL;
   VOS_STATUS status = 0;

   /* OEM message is always to a specific process and cannot be a broadcast */
   if (pHddCtx->oem_pid == 0)
   {
      VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                "%s: invalid dest pid", __func__);
      return;
   }

   skb = alloc_skb(NLMSG_SPACE(WLAN_NL_MAX_PAYLOAD), GFP_KERNEL);
   if (skb == NULL)
   {
      VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                "%s: alloc_skb failed", __func__);
      return;
   }

   nlh = (struct nlmsghdr *)skb->data;
   nlh->nlmsg_pid = 0;  /* from kernel */
   nlh->nlmsg_flags = 0;
   nlh->nlmsg_seq = 0;
   nlh->nlmsg_type = WLAN_NL_MSG_OEM;
   aniHdr = NLMSG_DATA(nlh);
   aniHdr->type = ANI_MSG_APP_REG_RSP;

   /* Fill message body:
    *   First byte will be number of interfaces, followed by
    *   two bytes for each interfaces
    *     - one byte for device mode
    *     - one byte for vdev id
    */
   buf = (char *) ((char *)aniHdr + sizeof(tAniMsgHdr));
   numInterfaces = buf++;
   *numInterfaces = 0;

   /* Iterate through each of the adapters and fill device mode and vdev id */
   status = hdd_get_front_adapter(pHddCtx, &pAdapterNode);
   while ((VOS_STATUS_SUCCESS == status) && pAdapterNode)
   {
     pAdapter = pAdapterNode->pAdapter;
     if (pAdapter)
     {
       deviceMode = buf++;
       vdevId = buf++;
       *deviceMode = pAdapter->device_mode;
       *vdevId = pAdapter->sessionId;
       (*numInterfaces)++;
       VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO,
                 "%s: numInterfaces: %d, deviceMode: %d, vdevId: %d",
                 __func__, *numInterfaces, *deviceMode, *vdevId);
     }
     status = hdd_get_next_adapter(pHddCtx, pAdapterNode, &pNext);
     pAdapterNode = pNext;
   }

   aniHdr->length = sizeof(tANI_U8) + (*numInterfaces) * 2 * sizeof(tANI_U8);
   nlh->nlmsg_len = NLMSG_LENGTH((sizeof(tAniMsgHdr) + aniHdr->length));

   skb_put(skb, NLMSG_SPACE((sizeof(tAniMsgHdr) + aniHdr->length)));

   VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO,
             "%s: sending App Reg Response length (%d) to process pid (%d)",
             __func__, aniHdr->length, pHddCtx->oem_pid);

   (void)nl_srv_ucast_oem(skb, pHddCtx->oem_pid, MSG_DONTWAIT);

   return;
}

/**---------------------------------------------------------------------------

  \brief send_oem_err_rsp_nlink_msg() - send oem error response

  This function sends error response to oem app

  \param -
     - app_pid - PID of oem application process

  \return - none

  --------------------------------------------------------------------------*/
static void send_oem_err_rsp_nlink_msg(v_SINT_t app_pid, tANI_U8 error_code)
{
   struct sk_buff *skb;
   struct nlmsghdr *nlh;
   tAniMsgHdr *aniHdr;
   tANI_U8 *buf;

   skb = alloc_skb(NLMSG_SPACE(WLAN_NL_MAX_PAYLOAD), GFP_KERNEL);
   if (skb == NULL)
   {
      VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                "%s: alloc_skb failed", __func__);
      return;
   }

   nlh = (struct nlmsghdr *)skb->data;
   nlh->nlmsg_pid = 0;  /* from kernel */
   nlh->nlmsg_flags = 0;
   nlh->nlmsg_seq = 0;
   nlh->nlmsg_type = WLAN_NL_MSG_OEM;
   aniHdr = NLMSG_DATA(nlh);
   aniHdr->type = ANI_MSG_OEM_ERROR;
   aniHdr->length = sizeof(tANI_U8);
   nlh->nlmsg_len = NLMSG_LENGTH(sizeof(tAniMsgHdr) + aniHdr->length);

   /* message body will contain one byte of error code */
   buf = (char *) ((char *) aniHdr + sizeof(tAniMsgHdr));
   *buf = error_code;

   skb_put(skb, NLMSG_SPACE(sizeof(tAniMsgHdr) + aniHdr->length));

   VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO,
             "%s: sending oem error response to process pid (%d)",
             __func__, app_pid);

   (void)nl_srv_ucast_oem(skb, app_pid, MSG_DONTWAIT);

   return;
}

/**---------------------------------------------------------------------------

  \brief send_oem_data_rsp_msg() - send oem data response

  This function sends oem data rsp message to registered application process
  over the netlink socket.

  \param -
     - oemDataRsp - Pointer to OEM Data Response struct

  \return - 0 for success, non zero for failure

  --------------------------------------------------------------------------*/
void send_oem_data_rsp_msg(int length, tANI_U8 *oemDataRsp)
{
   struct sk_buff *skb;
   struct nlmsghdr *nlh;
   tAniMsgHdr *aniHdr;
   tANI_U8 *oemData;

   /* OEM message is always to a specific process and cannot be a broadcast */
   if (pHddCtx->oem_pid == 0)
   {
      VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                "%s: invalid dest pid", __func__);
      return;
   }

   if (length > OEM_DATA_RSP_SIZE)
   {
      VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                "%s: invalid length of Oem Data response", __func__);
      return;
   }

   skb = alloc_skb(NLMSG_SPACE(sizeof(tAniMsgHdr) + OEM_DATA_RSP_SIZE),
                   GFP_KERNEL);
   if (skb == NULL)
   {
      VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                "%s: alloc_skb failed", __func__);
      return;
   }

   nlh = (struct nlmsghdr *)skb->data;
   nlh->nlmsg_pid = 0;  /* from kernel */
   nlh->nlmsg_flags = 0;
   nlh->nlmsg_seq = 0;
   nlh->nlmsg_type = WLAN_NL_MSG_OEM;
   aniHdr = NLMSG_DATA(nlh);
   aniHdr->type = ANI_MSG_OEM_DATA_RSP;

   aniHdr->length = length;
   nlh->nlmsg_len = NLMSG_LENGTH((sizeof(tAniMsgHdr) + aniHdr->length));
   oemData = (tANI_U8 *) ((char *)aniHdr + sizeof(tAniMsgHdr));
   vos_mem_copy(oemData, oemDataRsp, length);

   skb_put(skb, NLMSG_SPACE((sizeof(tAniMsgHdr) + aniHdr->length)));

   VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO,
             "%s: sending Oem Data Response of len (%d) to process pid (%d)",
             __func__, length, pHddCtx->oem_pid);

   (void)nl_srv_ucast_oem(skb, pHddCtx->oem_pid, MSG_DONTWAIT);

   return;
}

/**---------------------------------------------------------------------------

  \brief oem_process_data_req_msg() - process oem data request

  This function sends oem message to SME

  \param -
     - oemDataLen - Length to OEM Data buffer
     - oemData - Pointer to OEM Data buffer

  \return - eHalStatus enumeration

  --------------------------------------------------------------------------*/
static eHalStatus oem_process_data_req_msg(int oemDataLen, char *oemData)
{
   hdd_adapter_t *pAdapter = NULL;
   tOemDataReqConfig oemDataReqConfig;
   tANI_U32 oemDataReqID = 0;
   eHalStatus status = eHAL_STATUS_SUCCESS;

   /* for now, STA interface only */
   pAdapter = hdd_get_adapter(pHddCtx, WLAN_HDD_INFRA_STATION);
   if (!pAdapter)
   {
      VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                "%s: No adapter for STA mode", __func__);
      return eHAL_STATUS_FAILURE;
   }

   if (!oemData)
   {
      VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                "%s: oemData is null", __func__);
      return eHAL_STATUS_FAILURE;
   }

   vos_mem_zero(&oemDataReqConfig, sizeof(tOemDataReqConfig));

   oemDataReqConfig.data = vos_mem_malloc(oemDataLen);
   if (!oemDataReqConfig.data) {
      hddLog(LOGE, FL("malloc failed for data req buffer"));
      return eHAL_STATUS_FAILED_ALLOC;
   }

   oemDataReqConfig.data_len = oemDataLen;
   vos_mem_copy(oemDataReqConfig.data, oemData, oemDataLen);

   VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO,
             "%s: calling sme_OemDataReq", __func__);

   status = sme_OemDataReq(pHddCtx->hHal,
                           pAdapter->sessionId,
                           &oemDataReqConfig,
                           &oemDataReqID);

   vos_mem_free(oemDataReqConfig.data);
   return status;
}

/**
 * update_channel_bw_info() - set bandwidth info for the chan
 * @hdd_ctx: hdd context
 * @chan: channel for which info are required
 * @hdd_chan_info: struct where the bandwidth info is filled
 *
 * This function find the maximum bandwidth allowed, secondary
 * channel offset and center freq for the channel as per regulatory
 * domain and using these info calculate the phy mode for the
 * channel.
 *
 * Return: void
 */
static inline void hdd_update_channel_bw_info(hdd_context_t *hdd_ctx,
	uint16_t chan, tHddChannelInfo *hdd_chan_info)
{
	struct ch_params_s ch_params = {0};
	uint16_t sec_ch_2g = 0;
	uint8_t vht_capable;
	WLAN_PHY_MODE phy_mode;
	uint32_t wni_dot11_mode;

	wni_dot11_mode = sme_get_wni_dot11_mode(hdd_ctx->hHal);

	vht_capable = IS_DOT11_MODE_VHT(wni_dot11_mode);

	if (chan <= SIR_11B_CHANNEL_END) {
		if (chan <= 5)
			sec_ch_2g = chan + 4;
		else
			sec_ch_2g = chan - 4;
		if (!hdd_ctx->cfg_ini->enableVhtFor24GHzBand)
			vht_capable = false;
	}
	/* Passing CH_WIDTH_MAX will give the max bandwidth supported */
	ch_params.ch_width = CH_WIDTH_MAX;

	vos_set_channel_params(chan, sec_ch_2g, &ch_params);
	if (ch_params.center_freq_seg0)
		hdd_chan_info->band_center_freq1 =
			ch_params.center_freq_seg0;

	hddLog(LOG1,
		FL("chan %d wni_dot11_mode %d ch_width %d sec offset %d center_freq_seg0 %d"),
		chan, wni_dot11_mode, ch_params.ch_width,
		ch_params.sec_ch_offset, ch_params.center_freq_seg0);

	phy_mode = wma_chan_to_mode(chan, ch_params.sec_ch_offset,
				vht_capable, wni_dot11_mode);
	WMI_SET_CHANNEL_MODE(hdd_chan_info, phy_mode);
}

/**---------------------------------------------------------------------------

  \brief oem_process_channel_info_req_msg() - process oem channel_info request

  This function responds with channel info to oem process

  \param -
     - numOfChannels - number of channels
     - chanList - channel list

  \return - 0 for success, non zero for failure

  --------------------------------------------------------------------------*/
static int oem_process_channel_info_req_msg(int numOfChannels, char *chanList)
{
   struct sk_buff *skb;
   struct nlmsghdr *nlh;
   tAniMsgHdr *aniHdr;
   tHddChannelInfo *pHddChanInfo;
   tHddChannelInfo hddChanInfo;
   tANI_U8 chanId;
   tANI_U32 reg_info_1;
   tANI_U32 reg_info_2;
   eHalStatus status = eHAL_STATUS_FAILURE;
   int i;
   tANI_U8 *buf;

   /* OEM message is always to a specific process and cannot be a broadcast */
   if (pHddCtx->oem_pid == 0)
   {
      VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                "%s: invalid dest pid", __func__);
      return -1;
   }

   skb = alloc_skb(NLMSG_SPACE(sizeof(tAniMsgHdr) + sizeof(tANI_U8) +
                   numOfChannels * sizeof(tHddChannelInfo)), GFP_KERNEL);
   if (skb == NULL)
   {
      VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                "%s: alloc_skb failed", __func__);
      return -1;
   }

   nlh = (struct nlmsghdr *)skb->data;
   nlh->nlmsg_pid = 0;  /* from kernel */
   nlh->nlmsg_flags = 0;
   nlh->nlmsg_seq = 0;
   nlh->nlmsg_type = WLAN_NL_MSG_OEM;
   aniHdr = NLMSG_DATA(nlh);
   aniHdr->type = ANI_MSG_CHANNEL_INFO_RSP;

   aniHdr->length = sizeof(tANI_U8) + numOfChannels * sizeof(tHddChannelInfo);
   nlh->nlmsg_len = NLMSG_LENGTH((sizeof(tAniMsgHdr) + aniHdr->length));

   /* First byte of message body will have num of channels */
   buf = (char *) ((char *)aniHdr + sizeof(tAniMsgHdr));
   *buf++ = numOfChannels;

   /* Next follows channel info struct for each channel id.
    * If chan id is wrong or SME returns failure for a channel
    * then fill in 0 in channel info for that particular channel
    */
   for (i = 0 ; i < numOfChannels; i++)
   {
      pHddChanInfo = (tHddChannelInfo *) ((char *) buf +
                                        i * sizeof(tHddChannelInfo));

      chanId = chanList[i];
      status = sme_getRegInfo(pHddCtx->hHal, chanId,
                              &reg_info_1, &reg_info_2);
      if (eHAL_STATUS_SUCCESS == status)
      {
         /* band center freq1, and freq2 depends on peer's capability
          * and at this time we might not be associated on the given channel,
          * so fill freq1=mhz, and freq2=0
          */
         hddChanInfo.chan_id = chanId;
         hddChanInfo.reserved0 = 0;
         hddChanInfo.mhz = vos_chan_to_freq(chanId);
         hddChanInfo.band_center_freq1 = hddChanInfo.mhz;
         hddChanInfo.band_center_freq2 = 0;

         /* set only DFS flag in info, rest of the fields will be filled in
          *  by the OEM App
          */
         hddChanInfo.info = 0;
         if (NV_CHANNEL_DFS == vos_nv_getChannelEnabledState(chanId))
             WMI_SET_CHANNEL_FLAG(&hddChanInfo, WMI_CHAN_FLAG_DFS);

         hdd_update_channel_bw_info(pHddCtx, chanId, &hddChanInfo);

         hddChanInfo.reg_info_1 = reg_info_1;
         hddChanInfo.reg_info_2 = reg_info_2;
      }
      else
      {
         /* chanId passed to sme_getRegInfo is not valid, fill in zeros
          * in channel info struct
          */
         VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO,
                   "%s: sme_getRegInfo failed for chan (%d), return info 0",
                   __func__, chanId);
         hddChanInfo.chan_id = chanId;
         hddChanInfo.reserved0 = 0;
         hddChanInfo.mhz = 0;
         hddChanInfo.band_center_freq1 = 0;
         hddChanInfo.band_center_freq2 = 0;
         hddChanInfo.info = 0;
         hddChanInfo.reg_info_1 = 0;
         hddChanInfo.reg_info_2 = 0;
      }
      vos_mem_copy(pHddChanInfo, &hddChanInfo, sizeof(tHddChannelInfo));
   }

   skb_put(skb, NLMSG_SPACE((sizeof(tAniMsgHdr) + aniHdr->length)));

   VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO,
             "%s: sending channel info resp for num channels (%d) to pid (%d)",
             __func__, numOfChannels, pHddCtx->oem_pid);

   (void)nl_srv_ucast_oem(skb, pHddCtx->oem_pid, MSG_DONTWAIT);

   return 0;
}

/**
 * oem_process_set_cap_req_msg() - process oem set capability request
 * @oem_cap_len: Length of OEM capability
 * @oem_cap: Pointer to OEM capability buffer
 * @app_pid: process ID, to which rsp message is to be sent
 *
 * This function sends oem message to SME
 *
 * Return: error code
 */
static int oem_process_set_cap_req_msg(int oem_cap_len,
				       char *oem_cap, int32_t app_pid)
{
	VOS_STATUS status;
	int error_code;
	struct sk_buff *skb;
	struct nlmsghdr *nlh;
	tAniMsgHdr *ani_hdr;
	uint8_t *buf;

	if (!oem_cap) {
		hddLog(LOGE, FL("oem_cap is null"));
		return -EINVAL;
	}

	status = sme_oem_update_capability(pHddCtx->hHal,
					(struct sme_oem_capability *)oem_cap);
	if (!VOS_IS_STATUS_SUCCESS(status))
		hddLog(LOGE, FL("error updating rm capability, status: %d"),
			     status);
	error_code = vos_status_to_os_return(status);

	skb = alloc_skb(NLMSG_SPACE(WLAN_NL_MAX_PAYLOAD), GFP_KERNEL);
	if (skb == NULL) {
		hddLog(LOGE, FL("alloc_skb failed"));
		return -ENOMEM;
	}

	nlh = (struct nlmsghdr *)skb->data;
	nlh->nlmsg_pid = 0;     /* from kernel */
	nlh->nlmsg_flags = 0;
	nlh->nlmsg_seq = 0;
	nlh->nlmsg_type = WLAN_NL_MSG_OEM;
	ani_hdr = NLMSG_DATA(nlh);
	ani_hdr->type = ANI_MSG_SET_OEM_CAP_RSP;
	/* 64 bit alignment */
	ani_hdr->length = sizeof(error_code);
	nlh->nlmsg_len = NLMSG_LENGTH(sizeof(tAniMsgHdr) + ani_hdr->length);

	/* message body will contain only status code */
	buf = (char *)((char *)ani_hdr + sizeof(tAniMsgHdr));
	vos_mem_copy(buf, &error_code, ani_hdr->length);

	skb_put(skb, NLMSG_SPACE(sizeof(tAniMsgHdr) + ani_hdr->length));

	hddLog(LOG1, FL("sending oem response to process pid %d"), app_pid);

	(void)nl_srv_ucast_oem(skb, app_pid, MSG_DONTWAIT);

	return error_code;
}

/**
 * oem_process_get_cap_req_msg() - process oem get capability request
 *
 * This function process the get capability request from OEM and responds
 * with the capability.
 *
 * Return: error code
 */
static int oem_process_get_cap_req_msg(void)
{
	int error_code;
	struct oem_get_capability_rsp *cap_rsp;
	t_iw_oem_data_cap data_cap = { {0} };
	struct sme_oem_capability oem_cap;
	hdd_adapter_t *adapter;
	struct sk_buff *skb;
	struct nlmsghdr *nlh;
	tAniMsgHdr *ani_hdr;
	uint8_t *buf;

	/* for now, STA interface only */
	adapter = hdd_get_adapter(pHddCtx, WLAN_HDD_INFRA_STATION);
	if (!adapter) {
		hddLog(LOGE, FL("No adapter for STA mode"));
		return -EINVAL;
	}

	error_code = populate_oem_data_cap(adapter, &data_cap);
	if (0 != error_code)
		return error_code;

	skb = alloc_skb(NLMSG_SPACE(sizeof(tAniMsgHdr) + sizeof(*cap_rsp)),
			GFP_KERNEL);
	if (skb == NULL) {
		hddLog(LOGE, FL("alloc_skb failed"));
		return -ENOMEM;
	}

	nlh = (struct nlmsghdr *)skb->data;
	nlh->nlmsg_pid = 0;     /* from kernel */
	nlh->nlmsg_flags = 0;
	nlh->nlmsg_seq = 0;
	nlh->nlmsg_type = WLAN_NL_MSG_OEM;
	ani_hdr = NLMSG_DATA(nlh);
	ani_hdr->type = ANI_MSG_GET_OEM_CAP_RSP;

	ani_hdr->length = sizeof(*cap_rsp);
	nlh->nlmsg_len = NLMSG_LENGTH((sizeof(tAniMsgHdr) + ani_hdr->length));

	buf = (char *)((char *)ani_hdr + sizeof(tAniMsgHdr));
	vos_mem_copy(buf, &data_cap, sizeof(data_cap));

	buf = (char *) buf +  sizeof(data_cap);
	vos_mem_zero(&oem_cap, sizeof(oem_cap));
	sme_oem_get_capability(pHddCtx->hHal, &oem_cap);
	vos_mem_copy(buf, &oem_cap, sizeof(oem_cap));

	skb_put(skb, NLMSG_SPACE((sizeof(tAniMsgHdr) + ani_hdr->length)));
	hddLog(LOG1, FL("send rsp to oem-pid:%d for get_capability"),
		pHddCtx->oem_pid);

	(void)nl_srv_ucast_oem(skb, pHddCtx->oem_pid, MSG_DONTWAIT);
	return 0;
}

/**
 * hdd_SendPeerStatusIndToOemApp() - sends peer status indication to OEM
 * @peerMac : MAC address of peer
 * @peerStatus : ePeerConnected or ePeerDisconnected
 * @peerTimingMeasCap : 0: RTT/RTT2, 1: RTT3. Default is 0
 * @sessionId : SME session id, i.e. vdev_id
 * @chanId: operating channel id
 * @dev_mode: dev mode for which indication is sent
 *
 * This function sends peer status indication to registered oem application.
 *
 * Return: void
 */
void hdd_SendPeerStatusIndToOemApp(v_MACADDR_t *peerMac,
                                   uint8_t peerStatus,
                                   uint8_t peerTimingMeasCap,
                                   uint8_t sessionId,
                                   tSirSmeChanInfo *chan_info,
                                   device_mode_t dev_mode)
{
   struct sk_buff *skb;
   struct nlmsghdr *nlh;
   tAniMsgHdr *aniHdr;
   tPeerStatusInfo *pPeerInfo;


   if (!pHddCtx || !pHddCtx->hHal)
   {
     VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
               "%s: Either HDD Ctx is null or Hal Ctx is null", __func__);
     return;
   }

   /* check if oem app has registered and pid is valid */
   if ((!pHddCtx->oem_app_registered) || (pHddCtx->oem_pid == 0))
   {
      VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO_HIGH,
                "%s: OEM app is not registered(%d) or pid is invalid(%d)",
                __func__, pHddCtx->oem_app_registered, pHddCtx->oem_pid);
      return;
   }

   skb = alloc_skb(NLMSG_SPACE(sizeof(tAniMsgHdr) + sizeof(tPeerStatusInfo)),
                   GFP_KERNEL);
   if (skb == NULL)
   {
      VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                "%s: alloc_skb failed", __func__);
      return;
   }

   nlh = (struct nlmsghdr *)skb->data;
   nlh->nlmsg_pid = 0;  /* from kernel */
   nlh->nlmsg_flags = 0;
   nlh->nlmsg_seq = 0;
   nlh->nlmsg_type = WLAN_NL_MSG_OEM;
   aniHdr = NLMSG_DATA(nlh);
   aniHdr->type = ANI_MSG_PEER_STATUS_IND;

   aniHdr->length = sizeof(tPeerStatusInfo);
   nlh->nlmsg_len = NLMSG_LENGTH((sizeof(tAniMsgHdr) + aniHdr->length));

   pPeerInfo = (tPeerStatusInfo *) ((char *)aniHdr + sizeof(tAniMsgHdr));

   vos_mem_copy(pPeerInfo->peer_mac_addr, peerMac->bytes,
                sizeof(peerMac->bytes));
   pPeerInfo->peer_status = peerStatus;
   pPeerInfo->vdev_id = sessionId;
   /* peerTimingMeasCap - bit mask for timing and fine timing Meas Cap */
   pPeerInfo->peer_capability = peerTimingMeasCap;
   pPeerInfo->reserved0 = 0;
   /* Set 0th bit of reserved0 for STA mode */
   if (WLAN_HDD_INFRA_STATION == dev_mode)
      pPeerInfo->reserved0 |= 0x01;

   if (chan_info) {
       pPeerInfo->peer_chan_info.chan_id = chan_info->chan_id;
       pPeerInfo->peer_chan_info.reserved0 = 0;
       pPeerInfo->peer_chan_info.mhz = chan_info->mhz;
       pPeerInfo->peer_chan_info.band_center_freq1 =
                                      chan_info->band_center_freq1;
       pPeerInfo->peer_chan_info.band_center_freq2 =
                                      chan_info->band_center_freq2;
       pPeerInfo->peer_chan_info.info = chan_info->info;
       pPeerInfo->peer_chan_info.reg_info_1 = chan_info->reg_info_1;
       pPeerInfo->peer_chan_info.reg_info_2 = chan_info->reg_info_2;
   } else {
       pPeerInfo->peer_chan_info.chan_id = 0;
       pPeerInfo->peer_chan_info.reserved0 = 0;
       pPeerInfo->peer_chan_info.mhz = 0;
       pPeerInfo->peer_chan_info.band_center_freq1 = 0;
       pPeerInfo->peer_chan_info.band_center_freq2 = 0;
       pPeerInfo->peer_chan_info.info = 0;
       pPeerInfo->peer_chan_info.reg_info_1 = 0;
       pPeerInfo->peer_chan_info.reg_info_2 = 0;
   }
   skb_put(skb, NLMSG_SPACE((sizeof(tAniMsgHdr) + aniHdr->length)));

   VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO_HIGH,
            "%s: sending peer "MAC_ADDRESS_STR
            " status(%d), peerTimingMeasCap(%d), vdevId(%d), chanId(%d)"
            " to oem app pid(%d), center freq 1 (%d), center freq 2 (%d),"
            " info (0x%x), frequency (%d),reg info 1 (0x%x),"
            " reg info 2 (0x%x) reserved0 %d",__func__, MAC_ADDR_ARRAY(peerMac->bytes),
             peerStatus, peerTimingMeasCap, sessionId,
             pPeerInfo->peer_chan_info.chan_id, pHddCtx->oem_pid,
             pPeerInfo->peer_chan_info.band_center_freq1,
             pPeerInfo->peer_chan_info.band_center_freq2,
             pPeerInfo->peer_chan_info.info,
             pPeerInfo->peer_chan_info.mhz,
             pPeerInfo->peer_chan_info.reg_info_1,
             pPeerInfo->peer_chan_info.reg_info_2,
             pPeerInfo->reserved0);

   (void)nl_srv_ucast_oem(skb, pHddCtx->oem_pid, MSG_DONTWAIT);

   return;
}

/**
 * oem_app_reg_req_handler() - function to handle APP registration request
 *                             from userspace
 * @hdd_ctx: handle to HDD context
 * @msg_hdr: pointer to ANI message header
 * @nlh: pointer to NL message header
 * @pid: Process ID
 *
 * Return: 0 if success, error code otherwise
 */
static int oem_app_reg_req_handler(struct hdd_context_s *hdd_ctx,
				   tAniMsgHdr *msg_hdr, int pid)
{
	char *sign_str = NULL;

	/* Registration request is only allowed for Qualcomm Application */
	hddLog(LOG1,
	       FL("Received App Reg Req from App process pid(%d), len(%d)"),
	       pid, msg_hdr->length);

	sign_str = (char *)((char *)msg_hdr + sizeof(tAniMsgHdr));
	if ((OEM_APP_SIGNATURE_LEN == msg_hdr->length) &&
	    (0 == strncmp(sign_str, OEM_APP_SIGNATURE_STR,
			  OEM_APP_SIGNATURE_LEN))) {
		hddLog(LOG1,
		       FL("Valid App Reg Req from oem app process pid(%d)"),
		       pid);

		hdd_ctx->oem_app_registered = TRUE;
		hdd_ctx->oem_pid = pid;
		send_oem_reg_rsp_nlink_msg();
	} else {
		hddLog(LOGE,
		       FL("Invalid signature in App Reg Req from pid(%d)"),
		       pid);
		send_oem_err_rsp_nlink_msg(pid, OEM_ERR_INVALID_SIGNATURE);
		return -EPERM;
	}

	return 0;
}

/**
 * oem_data_req_handler() - function to handle data_req from userspace
 * @hdd_ctx: handle to HDD context
 * @msg_hdr: pointer to ANI message header
 * @nlh: pointer to NL message header
 * @pid: Process ID
 *
 * Return: 0 if success, error code otherwise
 */
static int oem_data_req_handler(struct hdd_context_s *hdd_ctx,
				tAniMsgHdr *msg_hdr, int pid)
{
	hddLog(LOG1, FL("Received Oem Data Request length(%d) from pid: %d"),
		     msg_hdr->length, pid);

	if ((!hdd_ctx->oem_app_registered) ||
	    (pid != hdd_ctx->oem_pid)) {
		/* either oem app is not registered yet or pid is different */
		hddLog(LOGE, FL("OEM DataReq: app not registered(%d) or incorrect pid(%d)"),
			     hdd_ctx->oem_app_registered, pid);
		send_oem_err_rsp_nlink_msg(pid, OEM_ERR_APP_NOT_REGISTERED);
		return -EPERM;
	}

	if ((!msg_hdr->length) || (OEM_DATA_REQ_SIZE < msg_hdr->length)) {
		hddLog(LOGE, FL("Invalid length (%d) in Oem Data Request"),
			     msg_hdr->length);
		send_oem_err_rsp_nlink_msg(pid, OEM_ERR_INVALID_MESSAGE_LENGTH);
		return -EPERM;
	}

	oem_process_data_req_msg(msg_hdr->length,
				 (char *) ((char *)msg_hdr +
				 sizeof(tAniMsgHdr)));

	return 0;
}

/**
 * oem_chan_info_req_handler() - function to handle chan_info_req from userspace
 * @hdd_ctx: handle to HDD context
 * @msg_hdr: pointer to ANI message header
 * @nlh: pointer to NL message header
 * @pid: Process ID
 *
 * Return: 0 if success, error code otherwise
 */
static int oem_chan_info_req_handler(struct hdd_context_s *hdd_ctx,
				     tAniMsgHdr *msg_hdr, int pid)
{
	hddLog(LOG1,
	       FL("Received channel info request, num channel(%d) from pid: %d"),
	       msg_hdr->length, pid);

	if ((!hdd_ctx->oem_app_registered) ||
	    (pid != hdd_ctx->oem_pid)) {
		/* either oem app is not registered yet or pid is different */
		hddLog(LOGE,
		       FL("Chan InfoReq: app not registered(%d) or incorrect pid(%d)"),
		       hdd_ctx->oem_app_registered, pid);
		send_oem_err_rsp_nlink_msg(pid, OEM_ERR_APP_NOT_REGISTERED);
		return -EPERM;
	}

	/* message length contains list of channel ids */
	if ((!msg_hdr->length) ||
	    (WNI_CFG_VALID_CHANNEL_LIST_LEN < msg_hdr->length)) {
		hddLog(LOGE,
		       FL("Invalid length (%d) in channel info request"),
		       msg_hdr->length);
		send_oem_err_rsp_nlink_msg(pid, OEM_ERR_INVALID_MESSAGE_LENGTH);
		return -EPERM;
	}
	oem_process_channel_info_req_msg(msg_hdr->length,
		(char *)((char *)msg_hdr + sizeof(tAniMsgHdr)));

	return 0;
}

/**
 * oem_set_cap_req_handler() - function to handle set_cap_req from userspace
 * @hdd_ctx: handle to HDD context
 * @msg_hdr: pointer to ANI message header
 * @nlh: pointer to NL message header
 * @pid: Process ID
 *
 * Return: 0 if success, error code otherwise
 */
static int oem_set_cap_req_handler(struct hdd_context_s *hdd_ctx,
				   tAniMsgHdr *msg_hdr, int pid)
{
	hddLog(LOG1, FL("Received set oem cap req of length:%d from pid: %d"),
		     msg_hdr->length, pid);

	if ((!hdd_ctx->oem_app_registered) ||
	    (pid != hdd_ctx->oem_pid)) {
		/* oem app is not registered yet or pid is different */
		hddLog(LOGE, FL("set_oem_capability : app not registered(%d) or incorrect pid(%d)"),
			     hdd_ctx->oem_app_registered, pid);
		send_oem_err_rsp_nlink_msg(pid, OEM_ERR_APP_NOT_REGISTERED);
		return -EPERM;
	}

	if ((!msg_hdr->length) ||
		(sizeof(struct sme_oem_capability) < msg_hdr->length)) {
		hddLog(LOGE, FL("Invalid length (%d) in set_oem_capability"),
			     msg_hdr->length);
		send_oem_err_rsp_nlink_msg(pid, OEM_ERR_INVALID_MESSAGE_LENGTH);
		return -EPERM;
	}

	oem_process_set_cap_req_msg(msg_hdr->length, (char *)
				    ((char *)msg_hdr + sizeof(tAniMsgHdr)),
				    pid);
	return 0;
}

/**
 * oem_get_cap_req_handler() - function to handle get_cap_req from userspace
 * @hdd_ctx: handle to HDD context
 * @msg_hdr: pointer to ANI message header
 * @nlh: pointer to NL message header
 * @pid: Process ID
 *
 * Return: 0 if success, error code otherwise
 */
static int oem_get_cap_req_handler(struct hdd_context_s *hdd_ctx,
				   tAniMsgHdr *msg_hdr, int pid)
{
	hddLog(LOG1, FL("Rcvd get oem capability req - length:%d from pid: %d"),
		     msg_hdr->length, pid);

	if ((!hdd_ctx->oem_app_registered) ||
	    (pid != hdd_ctx->oem_pid)) {
		/* oem app is not registered yet or pid is different */
		hddLog(LOGE, FL("get_oem_capability : app not registered(%d) or incorrect pid(%d)"),
			     hdd_ctx->oem_app_registered, pid);
		send_oem_err_rsp_nlink_msg(pid, OEM_ERR_APP_NOT_REGISTERED);
		return -EPERM;
	}

	oem_process_get_cap_req_msg();
	return 0;
}

/**
 * oem_request_dispatcher() - OEM command dispatcher API
 * @msg_hdr: ANI Message Header
 * @pid: process id
 *
 * This API is used to dispatch the command from OEM depending
 * on the type of the message received.
 *
 * Return: None
 */
static void oem_request_dispatcher(tAniMsgHdr *msg_hdr, int pid)
{
	switch (msg_hdr->type) {
	case ANI_MSG_APP_REG_REQ:
		oem_app_reg_req_handler(pHddCtx, msg_hdr, pid);
		break;

	case ANI_MSG_OEM_DATA_REQ:
		oem_data_req_handler(pHddCtx, msg_hdr, pid);
		break;

	case ANI_MSG_CHANNEL_INFO_REQ:
		oem_chan_info_req_handler(pHddCtx, msg_hdr, pid);
		break;

	case ANI_MSG_SET_OEM_CAP_REQ:
		oem_set_cap_req_handler(pHddCtx, msg_hdr, pid);
		break;

	case ANI_MSG_GET_OEM_CAP_REQ:
		oem_get_cap_req_handler(pHddCtx, msg_hdr, pid);
		break;

	default:
		hddLog(LOGE, FL("Received Invalid message type (%d), length (%d)"),
				msg_hdr->type, msg_hdr->length);
		send_oem_err_rsp_nlink_msg(pid, OEM_ERR_INVALID_MESSAGE_TYPE);
	}
}

#ifdef CNSS_GENL
/**
 * oem_cmd_handler() - API to handle OEM commands
 * @data: Pointer to data
 * @data_len: length of the received data
 * @ctx: Pointer to the context
 * @pid: Process id
 *
 * This API handles the command from OEM application from user space and
 * send back event to user space if necessary.
 *
 * Return: None
 */
static void oem_cmd_handler(const void *data, int data_len, void *ctx, int pid)
{
	tAniMsgHdr *msg_hdr;
	int msg_len;
	int ret;
	struct nlattr *tb[CLD80211_ATTR_MAX + 1];

	ret = wlan_hdd_validate_context(pHddCtx);
	if (ret) {
		hddLog(LOGE, FL("hdd ctx validate fails"));
		return;
	}

	/*
	 * audit note: it is ok to pass a NULL policy here since only
	 * one attribute is parsed and it is explicitly validated
	 */
	if (nla_parse(tb, CLD80211_ATTR_MAX, data, data_len, NULL)) {
		hddLog(LOGE, FL("Invalid ATTR"));
		return;
	}

	if (!tb[CLD80211_ATTR_DATA]) {
		hddLog(LOGE, FL("attr ATTR_DATA failed"));
		return;
	}

	msg_len = nla_len(tb[CLD80211_ATTR_DATA]);
	if (msg_len < sizeof(*msg_hdr)) {
		hdd_err("runt ATTR_DATA size %d", msg_len);
		send_oem_err_rsp_nlink_msg(pid, OEM_ERR_NULL_MESSAGE_HEADER);
		return;
	}

	msg_hdr = nla_data(tb[CLD80211_ATTR_DATA]);
	if (msg_len < (sizeof(*msg_hdr) + msg_hdr->length)) {
		hdd_err("Invalid nl msg len %d, msg hdr len %d",
			msg_len, msg_hdr->length);
		send_oem_err_rsp_nlink_msg(pid, OEM_ERR_INVALID_MESSAGE_LENGTH);
		return;
	}

	oem_request_dispatcher(msg_hdr, pid);
}

/**
 * oem_activate_service() - API to register the oem command handler
 * @hdd_ctx: Pointer to HDD Context
 *
 * This API is used to register the oem app command handler. Argument
 * @pAdapter is given for prototype compatibility with legacy code.
 *
 * Return: 0
 */
int oem_activate_service(void *hdd_ctx)
{
	pHddCtx = (struct hdd_context_s *) hdd_ctx;
	register_cld_cmd_cb(WLAN_NL_MSG_OEM, oem_cmd_handler, NULL);
	return 0;
}
#else
/*
 * Callback function invoked by Netlink service for all netlink
 * messages (from user space) addressed to WLAN_NL_MSG_OEM
 */

/**
 * oem_msg_callback() - callback invoked by netlink service
 * @skb:    skb with netlink message
 *
 * This function gets invoked by netlink service when a message
 * is received from user space addressed to WLAN_NL_MSG_OEM
 *
 * Return: zero on success
 *         On error, error number will be returned.
 */
static int oem_msg_callback(struct sk_buff *skb)
{
	struct nlmsghdr *nlh;
	tAniMsgHdr *msg_hdr;
	int ret;

	nlh = (struct nlmsghdr *)skb->data;

	if (!nlh) {
		hddLog(LOGE, FL("Netlink header null"));
		return -EPERM;
	}

	ret = wlan_hdd_validate_context(pHddCtx);
	if (0 != ret)
		return ret;

	msg_hdr = NLMSG_DATA(nlh);
	if (!msg_hdr) {
		hddLog(LOGE, FL("Message header null"));
		send_oem_err_rsp_nlink_msg(nlh->nlmsg_pid,
						OEM_ERR_NULL_MESSAGE_HEADER);
		return -EPERM;
	}

	if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(tAniMsgHdr) + msg_hdr->length)) {
		hddLog(LOGE, FL("Invalid nl msg len, nlh->nlmsg_len (%d), msg_hdr->len (%d)"),
				nlh->nlmsg_len, msg_hdr->length);
		send_oem_err_rsp_nlink_msg(nlh->nlmsg_pid,
				OEM_ERR_INVALID_MESSAGE_LENGTH);
		return -EPERM;
	}

	oem_request_dispatcher(msg_hdr, nlh->nlmsg_pid);
	return ret;
}

static int __oem_msg_callback(struct sk_buff *skb)
{
    int ret;

    vos_ssr_protect(__func__);
    ret = oem_msg_callback(skb);
    vos_ssr_unprotect(__func__);

    return ret;
}

/**---------------------------------------------------------------------------

  \brief oem_activate_service() - Activate oem message handler

  This function registers a handler to receive netlink message from
  an OEM application process.

  \param -
     - hdd_ctx: Pointer to HDD context

  \return - 0 for success, non zero for failure

  --------------------------------------------------------------------------*/
int oem_activate_service(void *hdd_ctx)
{
   pHddCtx = (struct hdd_context_s *) hdd_ctx;

   /* Register the msg handler for msgs addressed to WLAN_NL_MSG_OEM */
   nl_srv_register(WLAN_NL_MSG_OEM, __oem_msg_callback);
   return 0;
}
#endif
#endif