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 from utils import HwsimSkip
  16
  17 def wait_dfs_event(hapd, event, timeout):
  18     dfs_events = [ "DFS-RADAR-DETECTED", "DFS-NEW-CHANNEL",
  19                    "DFS-CAC-START", "DFS-CAC-COMPLETED",
  20                    "DFS-NOP-FINISHED", "AP-ENABLED", "AP-CSA-FINISHED" ]
  21     ev = hapd.wait_event(dfs_events, timeout=timeout)
  22     if not ev:
  23         raise Exception("DFS event timed out")
  24     if event and event not in ev:
  25         raise Exception("Unexpected DFS event")
  26     return ev
  27
  28 def start_dfs_ap(ap, allow_failure=False, ssid="dfs", ht=True, ht40=False,
  29                  ht40minus=False, vht80=False, vht20=False, chanlist=None,
  30                  channel=None):
  31     ifname = ap['ifname']
  32     logger.info("Starting AP " + ifname + " on DFS channel")
  33     hapd_global = hostapd.HostapdGlobal()
  34     hapd_global.remove(ifname)
  35     hapd_global.add(ifname)
  36     hapd = hostapd.Hostapd(ifname)
  37     if not hapd.ping():
  38         raise Exception("Could not ping hostapd")
  39     hapd.set_defaults()
  40     hapd.set("ssid", ssid)
  41     hapd.set("country_code", "FI")
  42     hapd.set("ieee80211d", "1")
  43     hapd.set("ieee80211h", "1")
  44     hapd.set("hw_mode", "a")
  45     hapd.set("channel", "52")
  46     if not ht:
  47         hapd.set("ieee80211n", "0")
  48     if ht40:
  49         hapd.set("ht_capab", "[HT40+]")
  50     elif ht40minus:
  51         hapd.set("ht_capab", "[HT40-]")
  52         hapd.set("channel", "56")
  53     if vht80:
  54         hapd.set("ieee80211ac", "1")
  55         hapd.set("vht_oper_chwidth", "1")
  56         hapd.set("vht_oper_centr_freq_seg0_idx", "58")
  57     if vht20:
  58         hapd.set("ieee80211ac", "1")
  59         hapd.set("vht_oper_chwidth", "0")
  60         hapd.set("vht_oper_centr_freq_seg0_idx", "0")
  61     if chanlist:
  62         hapd.set("chanlist", chanlist)
  63     if channel:
  64         hapd.set("channel", str(channel))
  65     hapd.enable()
  66
  67     ev = wait_dfs_event(hapd, "DFS-CAC-START", 5)
  68     if "DFS-CAC-START" not in ev:
  69         raise Exception("Unexpected DFS event")
  70
  71     state = hapd.get_status_field("state")
  72     if state != "DFS":
  73         if allow_failure:
  74             logger.info("Interface state not DFS: " + state)
  75             if not os.path.exists("dfs"):
  76                 raise HwsimSkip("Assume DFS testing not supported")
  77             raise Exception("Failed to start DFS AP")
  78         raise Exception("Unexpected interface state: " + state)
  79
  80     return hapd
  81
  82 def dfs_simulate_radar(hapd):
  83     logger.info("Trigger a simulated radar event")
  84     phyname = hapd.get_driver_status_field("phyname")
  85     radar_file = '/sys/kernel/debug/ieee80211/' + phyname + '/hwsim/dfs_simulate_radar'
  86     with open(radar_file, 'w') as f:
  87         f.write('1')
  88
  89 def test_dfs(dev, apdev):
  90     """DFS CAC functionality on clear channel"""
  91     try:
  92         hapd = None
  93         hapd = start_dfs_ap(apdev[0], allow_failure=True)
  94
  95         ev = wait_dfs_event(hapd, "DFS-CAC-COMPLETED", 70)
  96         if "success=1" not in ev:
  97             raise Exception("CAC failed")
  98         if "freq=5260" not in ev:
  99             raise Exception("Unexpected DFS freq result")
 100
 101         ev = hapd.wait_event(["AP-ENABLED"], timeout=5)
 102         if not ev:
 103             raise Exception("AP setup timed out")
 104
 105         state = hapd.get_status_field("state")
 106         if state != "ENABLED":
 107             raise Exception("Unexpected interface state")
 108
 109         freq = hapd.get_status_field("freq")
 110         if freq != "5260":
 111             raise Exception("Unexpected frequency")
 112
 113         dev[0].connect("dfs", key_mgmt="NONE")
 114         hwsim_utils.test_connectivity(dev[0], hapd)
 115
 116         hapd.request("RADAR DETECTED freq=5260 ht_enabled=1 chan_width=1")
 117         ev = hapd.wait_event(["DFS-RADAR-DETECTED"], timeout=10)
 118         if ev is None:
 119             raise Exception("DFS-RADAR-DETECTED event not reported")
 120         if "freq=5260" not in ev:
 121             raise Exception("Incorrect frequency in radar detected event: " + ev);
 122         ev = hapd.wait_event(["DFS-NEW-CHANNEL"], timeout=70)
 123         if ev is None:
 124             raise Exception("DFS-NEW-CHANNEL event not reported")
 125         if "freq=5260" in ev:
 126             raise Exception("Channel did not change after radar was detected");
 127
 128         ev = hapd.wait_event(["AP-CSA-FINISHED"], timeout=70)
 129         if ev is None:
 130             raise Exception("AP-CSA-FINISHED event not reported")
 131         if "freq=5260" in ev:
 132             raise Exception("Channel did not change after radar was detected(2)");
 133         time.sleep(1)
 134         hwsim_utils.test_connectivity(dev[0], hapd)
 135     finally:
 136         dev[0].request("DISCONNECT")
 137         if hapd:
 138             hapd.request("DISABLE")
 139         subprocess.call(['iw', 'reg', 'set', '00'])
 140         dev[0].flush_scan_cache()
 141
 142 def test_dfs_radar(dev, apdev):
 143     """DFS CAC functionality with radar detected"""
 144     try:
 145         hapd = None
 146         hapd2 = None
 147         hapd = start_dfs_ap(apdev[0], allow_failure=True)
 148         time.sleep(1)
 149
 150         dfs_simulate_radar(hapd)
 151
 152         hapd2 = start_dfs_ap(apdev[1], ssid="dfs2", ht40=True)
 153
 154         ev = wait_dfs_event(hapd, "DFS-CAC-COMPLETED", 5)
 155         if ev is None:
 156             raise Exception("Timeout on DFS aborted event")
 157         if "success=0 freq=5260" not in ev:
 158             raise Exception("Unexpected DFS aborted event contents: " + ev)
 159
 160         ev = wait_dfs_event(hapd, "DFS-RADAR-DETECTED", 5)
 161         if "freq=5260" not in ev:
 162             raise Exception("Unexpected DFS radar detection freq")
 163
 164         ev = wait_dfs_event(hapd, "DFS-NEW-CHANNEL", 5)
 165         if "freq=5260" in ev:
 166             raise Exception("Unexpected DFS new freq")
 167
 168         ev = wait_dfs_event(hapd, None, 5)
 169         if "AP-ENABLED" in ev:
 170             logger.info("Started AP on non-DFS channel")
 171         else:
 172             logger.info("Trying to start AP on another DFS channel")
 173             if "DFS-CAC-START" not in ev:
 174                 raise Exception("Unexpected DFS event")
 175             if "freq=5260" in ev:
 176                 raise Exception("Unexpected DFS CAC freq")
 177
 178             ev = wait_dfs_event(hapd, "DFS-CAC-COMPLETED", 70)
 179             if "success=1" not in ev:
 180                 raise Exception("CAC failed")
 181             if "freq=5260" in ev:
 182                 raise Exception("Unexpected DFS freq result - radar channel")
 183
 184             ev = hapd.wait_event(["AP-ENABLED"], timeout=5)
 185             if not ev:
 186                 raise Exception("AP setup timed out")
 187
 188             state = hapd.get_status_field("state")
 189             if state != "ENABLED":
 190                 raise Exception("Unexpected interface state")
 191
 192             freq = hapd.get_status_field("freq")
 193             if freq == "5260":
 194                 raise Exception("Unexpected frequency: " + freq)
 195
 196         dev[0].connect("dfs", key_mgmt="NONE")
 197
 198         ev = hapd2.wait_event(["AP-ENABLED"], timeout=70)
 199         if not ev:
 200             raise Exception("AP2 setup timed out")
 201
 202         dfs_simulate_radar(hapd2)
 203
 204         ev = wait_dfs_event(hapd2, "DFS-RADAR-DETECTED", 5)
 205         if "freq=5260 ht_enabled=1 chan_offset=1 chan_width=2" not in ev:
 206             raise Exception("Unexpected DFS radar detection freq from AP2")
 207
 208         ev = wait_dfs_event(hapd2, "DFS-NEW-CHANNEL", 5)
 209         if "freq=5260" in ev:
 210             raise Exception("Unexpected DFS new freq for AP2")
 211
 212         wait_dfs_event(hapd2, None, 5)
 213     finally:
 214         dev[0].request("DISCONNECT")
 215         if hapd:
 216             hapd.request("DISABLE")
 217         if hapd2:
 218             hapd2.request("DISABLE")
 219         subprocess.call(['iw', 'reg', 'set', '00'])
 220         dev[0].flush_scan_cache()
 221
 222 def test_dfs_radar_on_non_dfs_channel(dev, apdev):
 223     """DFS radar detection test code on non-DFS channel"""
 224     params = { "ssid": "radar" }
 225     hapd = hostapd.add_ap(apdev[0], params)
 226
 227     hapd.request("RADAR DETECTED freq=5260 ht_enabled=1 chan_width=1")
 228     hapd.request("RADAR DETECTED freq=2412 ht_enabled=1 chan_width=1")
 229
 230 def test_dfs_radar_chanlist(dev, apdev):
 231     """DFS chanlist when radar is detected"""
 232     try:
 233         hapd = None
 234         hapd = start_dfs_ap(apdev[0], chanlist="40 44", allow_failure=True)
 235         time.sleep(1)
 236
 237         dfs_simulate_radar(hapd)
 238
 239         ev = wait_dfs_event(hapd, "DFS-CAC-COMPLETED", 5)
 240         if ev is None:
 241             raise Exception("Timeout on DFS aborted event")
 242         if "success=0 freq=5260" not in ev:
 243             raise Exception("Unexpected DFS aborted event contents: " + ev)
 244
 245         ev = wait_dfs_event(hapd, "DFS-RADAR-DETECTED", 5)
 246         if "freq=5260" not in ev:
 247             raise Exception("Unexpected DFS radar detection freq")
 248
 249         ev = wait_dfs_event(hapd, "DFS-NEW-CHANNEL", 5)
 250         if "freq=5200 chan=40" not in ev and "freq=5220 chan=44" not in ev:
 251             raise Exception("Unexpected DFS new freq: " + ev)
 252
 253         ev = wait_dfs_event(hapd, None, 5)
 254         if "AP-ENABLED" not in ev:
 255             raise Exception("Unexpected DFS event")
 256         dev[0].connect("dfs", key_mgmt="NONE")
 257     finally:
 258         dev[0].request("DISCONNECT")
 259         if hapd:
 260             hapd.request("DISABLE")
 261         subprocess.call(['iw', 'reg', 'set', '00'])
 262         dev[0].flush_scan_cache()
 263
 264 def test_dfs_radar_chanlist_vht80(dev, apdev):
 265     """DFS chanlist when radar is detected and VHT80 configured"""
 266     try:
 267         hapd = None
 268         hapd = start_dfs_ap(apdev[0], chanlist="36", ht40=True, vht80=True,
 269                             allow_failure=True)
 270         time.sleep(1)
 271
 272         dfs_simulate_radar(hapd)
 273
 274         ev = wait_dfs_event(hapd, "DFS-CAC-COMPLETED", 5)
 275         if ev is None:
 276             raise Exception("Timeout on DFS aborted event")
 277         if "success=0 freq=5260" not in ev:
 278             raise Exception("Unexpected DFS aborted event contents: " + ev)
 279
 280         ev = wait_dfs_event(hapd, "DFS-RADAR-DETECTED", 5)
 281         if "freq=5260" not in ev:
 282             raise Exception("Unexpected DFS radar detection freq")
 283
 284         ev = wait_dfs_event(hapd, "DFS-NEW-CHANNEL", 5)
 285         if "freq=5180 chan=36 sec_chan=1" not in ev:
 286             raise Exception("Unexpected DFS new freq: " + ev)
 287
 288         ev = wait_dfs_event(hapd, None, 5)
 289         if "AP-ENABLED" not in ev:
 290             raise Exception("Unexpected DFS event")
 291         dev[0].connect("dfs", key_mgmt="NONE")
 292
 293         if hapd.get_status_field('vht_oper_centr_freq_seg0_idx') != "42":
 294             raise Exception("Unexpected seg0 idx")
 295     finally:
 296         dev[0].request("DISCONNECT")
 297         if hapd:
 298             hapd.request("DISABLE")
 299         subprocess.call(['iw', 'reg', 'set', '00'])
 300         dev[0].flush_scan_cache()
 301
 302 def test_dfs_radar_chanlist_vht20(dev, apdev):
 303     """DFS chanlist when radar is detected and VHT40 configured"""
 304     try:
 305         hapd = None
 306         hapd = start_dfs_ap(apdev[0], chanlist="36", vht20=True,
 307                             allow_failure=True)
 308         time.sleep(1)
 309
 310         dfs_simulate_radar(hapd)
 311
 312         ev = wait_dfs_event(hapd, "DFS-CAC-COMPLETED", 5)
 313         if ev is None:
 314             raise Exception("Timeout on DFS aborted event")
 315         if "success=0 freq=5260" not in ev:
 316             raise Exception("Unexpected DFS aborted event contents: " + ev)
 317
 318         ev = wait_dfs_event(hapd, "DFS-RADAR-DETECTED", 5)
 319         if "freq=5260" not in ev:
 320             raise Exception("Unexpected DFS radar detection freq")
 321
 322         ev = wait_dfs_event(hapd, "DFS-NEW-CHANNEL", 5)
 323         if "freq=5180 chan=36 sec_chan=0" not in ev:
 324             raise Exception("Unexpected DFS new freq: " + ev)
 325
 326         ev = wait_dfs_event(hapd, None, 5)
 327         if "AP-ENABLED" not in ev:
 328             raise Exception("Unexpected DFS event")
 329         dev[0].connect("dfs", key_mgmt="NONE")
 330     finally:
 331         dev[0].request("DISCONNECT")
 332         if hapd:
 333             hapd.request("DISABLE")
 334         subprocess.call(['iw', 'reg', 'set', '00'])
 335         dev[0].flush_scan_cache()
 336
 337 def test_dfs_radar_no_ht(dev, apdev):
 338     """DFS chanlist when radar is detected and no HT configured"""
 339     try:
 340         hapd = None
 341         hapd = start_dfs_ap(apdev[0], chanlist="36", ht=False,
 342                             allow_failure=True)
 343         time.sleep(1)
 344
 345         dfs_simulate_radar(hapd)
 346
 347         ev = wait_dfs_event(hapd, "DFS-CAC-COMPLETED", 5)
 348         if ev is None:
 349             raise Exception("Timeout on DFS aborted event")
 350         if "success=0 freq=5260" not in ev:
 351             raise Exception("Unexpected DFS aborted event contents: " + ev)
 352
 353         ev = wait_dfs_event(hapd, "DFS-RADAR-DETECTED", 5)
 354         if "freq=5260 ht_enabled=0" not in ev:
 355             raise Exception("Unexpected DFS radar detection freq: " + ev)
 356
 357         ev = wait_dfs_event(hapd, "DFS-NEW-CHANNEL", 5)
 358         if "freq=5180 chan=36 sec_chan=0" not in ev:
 359             raise Exception("Unexpected DFS new freq: " + ev)
 360
 361         ev = wait_dfs_event(hapd, None, 5)
 362         if "AP-ENABLED" not in ev:
 363             raise Exception("Unexpected DFS event")
 364         dev[0].connect("dfs", key_mgmt="NONE")
 365     finally:
 366         dev[0].request("DISCONNECT")
 367         if hapd:
 368             hapd.request("DISABLE")
 369         subprocess.call(['iw', 'reg', 'set', '00'])
 370         dev[0].flush_scan_cache()
 371
 372 def test_dfs_radar_ht40minus(dev, apdev):
 373     """DFS chanlist when radar is detected and HT40- configured"""
 374     try:
 375         hapd = None
 376         hapd = start_dfs_ap(apdev[0], chanlist="36", ht40minus=True,
 377                             allow_failure=True)
 378         time.sleep(1)
 379
 380         dfs_simulate_radar(hapd)
 381
 382         ev = wait_dfs_event(hapd, "DFS-CAC-COMPLETED", 5)
 383         if ev is None:
 384             raise Exception("Timeout on DFS aborted event")
 385         if "success=0 freq=5280 ht_enabled=1 chan_offset=-1" not in ev:
 386             raise Exception("Unexpected DFS aborted event contents: " + ev)
 387
 388         ev = wait_dfs_event(hapd, "DFS-RADAR-DETECTED", 5)
 389         if "freq=5280 ht_enabled=1 chan_offset=-1" not in ev:
 390             raise Exception("Unexpected DFS radar detection freq: " + ev)
 391
 392         ev = wait_dfs_event(hapd, "DFS-NEW-CHANNEL", 5)
 393         if "freq=5180 chan=36 sec_chan=1" not in ev:
 394             raise Exception("Unexpected DFS new freq: " + ev)
 395
 396         ev = wait_dfs_event(hapd, None, 5)
 397         if "AP-ENABLED" not in ev:
 398             raise Exception("Unexpected DFS event")
 399         dev[0].connect("dfs", key_mgmt="NONE")
 400     finally:
 401         dev[0].request("DISCONNECT")
 402         if hapd:
 403             hapd.request("DISABLE")
 404         subprocess.call(['iw', 'reg', 'set', '00'])
 405         dev[0].flush_scan_cache()
 406
 407 def test_dfs_ht40_minus(dev, apdev, params):
 408     """DFS CAC functionality on channel 104 HT40- [long]"""
 409     if not params['long']:
 410         raise HwsimSkip("Skip test case with long duration due to --long not specified")
 411     try:
 412         hapd = None
 413         hapd = start_dfs_ap(apdev[0], allow_failure=True, ht40minus=True,
 414                             channel=104)
 415
 416         ev = wait_dfs_event(hapd, "DFS-CAC-COMPLETED", 70)
 417         if "success=1" not in ev:
 418             raise Exception("CAC failed")
 419         if "freq=5520" not in ev:
 420             raise Exception("Unexpected DFS freq result")
 421
 422         ev = hapd.wait_event(["AP-ENABLED"], timeout=5)
 423         if not ev:
 424             raise Exception("AP setup timed out")
 425
 426         state = hapd.get_status_field("state")
 427         if state != "ENABLED":
 428             raise Exception("Unexpected interface state")
 429
 430         freq = hapd.get_status_field("freq")
 431         if freq != "5520":
 432             raise Exception("Unexpected frequency")
 433
 434         dev[0].connect("dfs", key_mgmt="NONE", scan_freq="5520")
 435         hwsim_utils.test_connectivity(dev[0], hapd)
 436     finally:
 437         dev[0].request("DISCONNECT")
 438         if hapd:
 439             hapd.request("DISABLE")
 440         subprocess.call(['iw', 'reg', 'set', '00'])
 441         dev[0].flush_scan_cache()