Function esp_wifi_remain_on_channel 

pub unsafe extern "C" fn esp_wifi_remain_on_channel(
    req: *mut wifi_roc_req_t,
) -> i32

@brief Remain on the target channel for required duration

@param req roc request structure containing relevant fields

@return

• ESP_OK: succeed
• ESP_ERR_NO_MEM: failed to allocate memory
• ESP_FAIL: failed to perform roc operation