tests/hwsim/test_dfs.py

   1 # Test cases for DFS
   2 # Copyright (c) 2013, Jouni Malinen <j@w1.fi>
   3 #
   4 # This software may be distributed under the terms of the BSD license.
   5 # See README for more details.
   6
   7 import os
   8 import subprocess
   9 import time
  10 import logging
  11 logger = logging.getLogger()
  12
  13 import hwsim_utils
  14 import hostapd
  15
  16 def wait_dfs_event(hapd, event, timeout):
  17     dfs_events = [ "DFS-RADAR-DETECTED", "DFS-NEW-CHANNEL",
  18                    "DFS-CAC-START", "DFS-CAC-COMPLETED",
  19                    "DFS-NOP-FINISHED", "AP-ENABLED" ]
  20     ev = hapd.wait_event(dfs_events, timeout=timeout)
  21     if not ev:
  22         raise Exception("DFS event timed out")
  23     if event and event not in ev:
  24         raise Exception("Unexpected DFS event")
  25     return ev
  26
  27 def start_dfs_ap(ap, allow_failure=False):
  28     ifname = ap['ifname']
  29     logger.info("Starting AP " + ifname + " on DFS channel")
  30     hapd_global = hostapd.HostapdGlobal()
  31     hapd_global.remove(ifname)
  32     hapd_global.add(ifname)
  33     hapd = hostapd.Hostapd(ifname)
  34     if not hapd.ping():
  35         raise Exception("Could not ping hostapd")
  36     hapd.set_defaults()
  37     hapd.set("ssid", "dfs")
  38     hapd.set("country_code", "FI")
  39     hapd.set("ieee80211d", "1")
  40     hapd.set("ieee80211h", "1")
  41     hapd.set("hw_mode", "a")
  42     hapd.set("channel", "52")
  43     hapd.enable()
  44
  45     ev = wait_dfs_event(hapd, "DFS-CAC-START", 5)
  46     if "DFS-CAC-START" not in ev:
  47         raise Exception("Unexpected DFS event")
  48
  49     state = hapd.get_status_field("state")
  50     if state != "DFS":
  51         if allow_failure:
  52             logger.info("Interface state not DFS: " + state)
  53             return None
  54         raise Exception("Unexpected interface state: " + state)
  55
  56     return hapd
  57
  58 def test_dfs(dev, apdev):
  59     """DFS CAC functionality on clear channel"""
  60     try:
  61         hapd = start_dfs_ap(apdev[0], allow_failure=True)
  62         if hapd is None:
  63             if not os.path.exists("dfs"):
  64                 return "skip"
  65             raise Exception("Failed to start DFS AP")
  66
  67         ev = wait_dfs_event(hapd, "DFS-CAC-COMPLETED", 70)
  68         if "success=1" not in ev:
  69             raise Exception("CAC failed")
  70         if "freq=5260" not in ev:
  71             raise Exception("Unexpected DFS freq result")
  72
  73         ev = hapd.wait_event(["AP-ENABLED"], timeout=5)
  74         if not ev:
  75             raise Exception("AP setup timed out")
  76
  77         state = hapd.get_status_field("state")
  78         if state != "ENABLED":
  79             raise Exception("Unexpected interface state")
  80
  81         freq = hapd.get_status_field("freq")
  82         if freq != "5260":
  83             raise Exception("Unexpected frequency")
  84
  85         dev[0].connect("dfs", key_mgmt="NONE")
  86         hwsim_utils.test_connectivity(dev[0], hapd)
  87
  88         hapd.request("RADAR DETECTED freq=5260 ht_enabled=1 chan_width=1")
  89         ev = hapd.wait_event(["DFS-RADAR-DETECTED"], timeout=10)
  90         if ev is None:
  91             raise Exception("DFS-RADAR-DETECTED event not reported")
  92         if "freq=5260" not in ev:
  93             raise Exception("Incorrect frequency in radar detected event: " + ev);
  94         ev = hapd.wait_event(["DFS-NEW-CHANNEL"], timeout=70)
  95         if ev is None:
  96             raise Exception("DFS-NEW-CHANNEL event not reported")
  97         if "freq=5260" in ev:
  98             raise Exception("Channel did not change after radar was detected");
  99
 100         ev = hapd.wait_event(["AP-CSA-FINISHED"], timeout=70)
 101         if ev is None:
 102             raise Exception("AP-CSA-FINISHED event not reported")
 103         if "freq=5260" in ev:
 104             raise Exception("Channel did not change after radar was detected(2)");
 105         time.sleep(1)
 106         hwsim_utils.test_connectivity(dev[0], hapd)
 107     finally:
 108         subprocess.call(['sudo', 'iw', 'reg', 'set', '00'])
 109
 110 def test_dfs_radar(dev, apdev):
 111     """DFS CAC functionality with radar detected"""
 112     try:
 113         hapd = start_dfs_ap(apdev[0])
 114         if hapd is None:
 115             if not os.path.exists("dfs"):
 116                 return "skip"
 117             raise Exception("Failed to start DFS AP")
 118         time.sleep(1)
 119
 120         phyname = hapd.get_driver_status_field("phyname")
 121         radar_file = '/sys/kernel/debug/ieee80211/' + phyname + '/hwsim/dfs_simulate_radar'
 122         cmd = subprocess.Popen(["sudo", "tee", radar_file],
 123                                stdin=subprocess.PIPE, stdout=subprocess.PIPE)
 124         cmd.stdin.write("1")
 125         cmd.stdin.close()
 126         cmd.stdout.read()
 127         cmd.stdout.close()
 128
 129         ev = wait_dfs_event(hapd, "DFS-CAC-COMPLETED", 5)
 130         if ev is None:
 131             raise Exception("Timeout on DFS aborted event")
 132         if "success=0 freq=5260" not in ev:
 133             raise Exception("Unexpected DFS aborted event contents: " + ev)
 134
 135         ev = wait_dfs_event(hapd, "DFS-RADAR-DETECTED", 5)
 136         if "freq=5260" not in ev:
 137             raise Exception("Unexpected DFS radar detection freq")
 138
 139         ev = wait_dfs_event(hapd, "DFS-NEW-CHANNEL", 5)
 140         if "freq=5260" in ev:
 141             raise Exception("Unexpected DFS new freq")
 142
 143         ev = wait_dfs_event(hapd, None, 5)
 144         if "AP-ENABLED" in ev:
 145             logger.info("Started AP on non-DFS channel")
 146         else:
 147             logger.info("Trying to start AP on another DFS channel")
 148             if "DFS-CAC-START" not in ev:
 149                 raise Exception("Unexpected DFS event")
 150             if "freq=5260" in ev:
 151                 raise Exception("Unexpected DFS CAC freq")
 152
 153             ev = wait_dfs_event(hapd, "DFS-CAC-COMPLETED", 70)
 154             if "success=1" not in ev:
 155                 raise Exception("CAC failed")
 156             if "freq=5260" in ev:
 157                 raise Exception("Unexpected DFS freq result - radar channel")
 158
 159             ev = hapd.wait_event(["AP-ENABLED"], timeout=5)
 160             if not ev:
 161                 raise Exception("AP setup timed out")
 162
 163             state = hapd.get_status_field("state")
 164             if state != "ENABLED":
 165                 raise Exception("Unexpected interface state")
 166
 167             freq = hapd.get_status_field("freq")
 168             if freq == "5260":
 169                 raise Exception("Unexpected frequency: " + freq)
 170
 171         dev[0].connect("dfs", key_mgmt="NONE")
 172     finally:
 173         subprocess.call(['sudo', 'iw', 'reg', 'set', '00'])
 174
 175 def test_dfs_radar_on_non_dfs_channel(dev, apdev):
 176     """DFS radar detection test code on non-DFS channel"""
 177     params = { "ssid": "radar" }
 178     hapd = hostapd.add_ap(apdev[0]['ifname'], params)
 179
 180     hapd.request("RADAR DETECTED freq=5260 ht_enabled=1 chan_width=1")
 181     hapd.request("RADAR DETECTED freq=2412 ht_enabled=1 chan_width=1")