zcl函数在zcl文档里的说明的疑问（求助TI工程师）

/*********************************************************************
 * @fn      zclClosures_RegisterDoorLockCmdCallbacks
 *
 * @brief   Register an applications DoorLock command callbacks
 *
 * @param   endpoint - application's endpoint
 * @param   callbacks - pointer to the callback record.
 *
 * @return  ZMemError if not able to allocate
 */
ZStatus_t zclClosures_RegisterDoorLockCmdCallbacks( uint8 endpoint, zclClosures_DoorLockAppCallbacks_t *callbacks )
{
  zclClosuresDoorLockCBRec_t *pNewItem;
  zclClosuresDoorLockCBRec_t *pLoop;

  // Register as a ZCL Plugin
  if ( !zclDoorLockPluginRegisted )
  {
    zcl_registerPlugin( ZCL_CLUSTER_ID_CLOSURES_DOOR_LOCK,
                        ZCL_CLUSTER_ID_CLOSURES_DOOR_LOCK,
                        zclClosures_HdlIncoming );
    zclDoorLockPluginRegisted = TRUE;
  }

  // Fill in the new profile list
  pNewItem = zcl_mem_alloc( sizeof( zclClosuresDoorLockCBRec_t ) );
  if ( pNewItem == NULL )
  {
    return ( ZMemError );
  }

  pNewItem->next = (zclClosuresDoorLockCBRec_t *)NULL;
  pNewItem->endpoint = endpoint;
  pNewItem->CBs = callbacks;

  // Find spot in list
  if ( zclClosuresDoorLockCBs == NULL )
  {
    zclClosuresDoorLockCBs = pNewItem;
  }
  else
  {
    // Look for end of list
    pLoop = zclClosuresDoorLockCBs;
    while ( pLoop->next != NULL )
    {
      pLoop = pLoop->next;
    }

    // Put new item at end of list
    pLoop->next = pNewItem;
  }
  return ( ZSuccess );
}

我知道这个函数在哪，我的问题是：这些函数在zcl文档里面为什么没有说明呢？ZCL应该是按照ZigBee官方协议的Standard-ZigBee Home Automation标准实现的吧？里面的很多功能是用户自己实现还是协议栈实现的？

还想问个问题：

1.要实现哪些回调函数以及回调函数在回调数组里面的排序是自己定义还是z-stack定义好的？

2.zclGeneral_HdlIncoming（）函数是在哪里被调用的，这个没有找到。