/******************************************************************************

 @file  att_rsp.c

 @brief This file contains att response utility functions commonly used by
        BLE applications for CC26xx with TIRTOS.

 Group: WCS, BTS
 Target Device: cc2640r2

 ******************************************************************************
 
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 All rights reserved.

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 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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 ******************************************************************************
 
 
 *****************************************************************************/

/*********************************************************************
 * INCLUDES
 */

 #include "att_rsp.h"
 
 /*********************************************************************
 * TYPEDEFS
 */
 
/*********************************************************************
 * LOCAL FUNCTIONS
 */

/*********************************************************************
 * EXTERNAL VARIABLES
 */

/*********************************************************************
 * LOCAL VARIABLES
 */

 static gattMsgEvent_t * pAttRsp;

/*********************************************************************
 * PUBLIC FUNCTIONS
 */

uint8_t attRsp_isAttRsp(gattMsgEvent_t * pMsg)
{
  // See if GATT server was unable to transmit an ATT response
  if (pMsg->hdr.status == blePending)
  {

      // First free any pending response
      attRsp_freeAttRsp(FAILURE);

      // Hold on to the response message for retransmission
      pAttRsp = pMsg;

      // There's a message to retransmit
      return (TRUE);
  }
  return (FALSE);
}


bStatus_t attRsp_sendAttRsp(void)
{
  // See if there's a pending ATT Response to be transmitted
  if (pAttRsp != NULL)
  {
    uint8_t status;

    // Try to retransmit ATT response till either we're successful or
    // the ATT Client times out (after 30s) and drops the connection.
    status = GATT_SendRsp(pAttRsp->connHandle, pAttRsp->method, &(pAttRsp->msg));
    if ((status != blePending) && (status != MSG_BUFFER_NOT_AVAIL))
    {
      // We're done with the response message
      attRsp_freeAttRsp(status);
    }
    return(status);
  }
  return(bleMemAllocError);
}


void attRsp_freeAttRsp(uint8_t status)
{
  // See if there's a pending ATT response message
  if (pAttRsp != NULL)
  {
    // See if the response was sent out successfully
    if (status != SUCCESS)
    {
      // Free response payload
      GATT_bm_free(&pAttRsp->msg, pAttRsp->method);
    }
    
    // Free response message
    ICall_freeMsg(pAttRsp);
    
    // Reset our globals
    pAttRsp = NULL;
  }
}

