text: # autoscan tests
  # Copyright (c) 2014, Jouni Malinen <j@w1.fi>
  #
  # This software may be distributed under the terms of the BSD license.
  # See README for more details.
  
  import time
  import logging
  logger = logging.getLogger()
  import os
  
  import hostapd
  
  def test_autoscan_periodic(dev, apdev):
      """autoscan_periodic"""
      hostapd.add_ap(apdev[0], { "ssid": "autoscan" })
  
      try:
          if "OK" not in dev[0].request("AUTOSCAN periodic:1"):
              raise Exception("Failed to set autoscan")
          id = dev[0].connect("not-used", key_mgmt="NONE", scan_freq="2412",
                              wait_connect=False)
          times = {}
          for i in range(0, 3):
              logger.info("Waiting for scan to start")
              start = os.times()[4]
              ev = dev[0].wait_event(["CTRL-EVENT-SCAN-STARTED"], timeout=5)
              if ev is None:
                  raise Exception("did not start a scan")
              stop = os.times()[4]
              times[i] = stop - start
              logger.info("Waiting for scan to complete")
              ev = dev[0].wait_event(["CTRL-EVENT-SCAN-RESULTS"], 10)
              if ev is None:
                  raise Exception("did not complete a scan")
          if times[0] > 1 or times[1] < 0.5 or times[1] > 1.5 or times[2] < 0.5 or times[2] > 1.5:
              raise Exception("Unexpected scan timing: " + str(times))
  
          # scan some more channels to allow some more time for reseting AUTOSCAN
          # while a scan is in progress
          dev[0].set_network(id, "scan_freq", "2412 2437 2462 5180 5200 5220 5240")
          dev[0].dump_monitor()
          ev = dev[0].wait_event(["CTRL-EVENT-SCAN-STARTED"], timeout=5)
          if ev is None:
              raise Exception("did not start a scan")
          if "OK" not in dev[0].request("AUTOSCAN periodic:2"):
              raise Exception("Failed to (re)set autoscan")
          ev = dev[0].wait_event(["CTRL-EVENT-SCAN-RESULTS"], 10)
          if ev is None:
              raise Exception("did not complete a scan")
      finally:
          dev[0].request("AUTOSCAN ")
  
  def test_autoscan_exponential(dev, apdev):
      """autoscan_exponential"""
      hostapd.add_ap(apdev[0], { "ssid": "autoscan" })
  
      try:
          if "OK" not in dev[0].request("AUTOSCAN exponential:2:10"):
              raise Exception("Failed to set autoscan")
          dev[0].connect("not-used", key_mgmt="NONE", scan_freq="2412",
                         wait_connect=False)
          times = {}
          for i in range(0, 3):
              logger.info("Waiting for scan to start")
              start = os.times()[4]
              ev = dev[0].wait_event(["CTRL-EVENT-SCAN-STARTED"], timeout=5)
              if ev is None:
                  raise Exception("did not start a scan")
              stop = os.times()[4]
              times[i] = stop - start
              logger.info("Waiting for scan to complete")
              ev = dev[0].wait_event(["CTRL-EVENT-SCAN-RESULTS"], 10)
              if ev is None:
                  raise Exception("did not complete a scan")
          if times[0] > 1 or times[1] < 1 or times[1] > 3 or times[2] < 3 or times[2] > 5:
              raise Exception("Unexpected scan timing: " + str(times))
      finally:
          dev[0].request("AUTOSCAN ")
  