BLE_HCI_LE_SET_EXT_ADV_PROP_LEGACY_LD_DIR

esp_idf_sys

Constant BLE_HCI_LE_SET_EXT_ADV_PROP_LEGACY_LD_DIR 

Source 
pub const BLE_HCI_LE_SET_EXT_ADV_PROP_LEGACY_LD_DIR: u32 = 21;