How can i start an advertising with a whitelist?

[king]

Hi all, I'm reading the ble_peripheral samples of the SDK. I know start a advertising with the function ble_advertising_start(); Now, i know a central address, then i want connect to that device. I want start the advertising with a whitelist for can be connected by that central only. How to modify the sample codes and do i need irks or something else? Thanks~~

[king]

case BLE_ADV_EVT_WHITELIST_REQUEST: { ble_gap_whitelist_t whitelist;

					ble_gap_addr_t    * sp_whitelist_addr[BLE_GAP_WHITELIST_ADDR_MAX_COUNT];
					ble_gap_irk_t     * sp_whitelist_irk[BLE_GAP_WHITELIST_IRK_MAX_COUNT];
					whitelist.addr_count = BLE_GAP_WHITELIST_ADDR_MAX_COUNT;
					whitelist.irk_count  = BLE_GAP_WHITELIST_IRK_MAX_COUNT;
					whitelist.pp_addrs   = sp_whitelist_addr;
					whitelist.pp_irks    = sp_whitelist_irk;

					err_code = dm_whitelist_create(&m_dm_app_id, &whitelist);
					APP_ERROR_CHECK(err_code);

					err_code = ble_advertising_whitelist_reply(&whitelist);
					APP_ERROR_CHECK(err_code);
					break;
			}