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hostap/tests/hwsim/test_dfs.py
Jouni Malinen 9d7fdac5b3 tests: Try to clear scan results after regulatory domain changes 
It was possible for regulatory domain changes to "leak" into following
test cases in number of cases where the cfg80211 BSS table remained
after regulatory domain had been restored to world roaming. Try to make
this less likely to occur by explicitly clearing BSS table at the end of
test cases that use different regulatory domain. This makes P2P test
cases that verify channel selection based on world roaming rules more
robust.

Signed-off-by: Jouni Malinen <j@w1.fi>
2014-12-15 01:32:01 +02:00

337 lines
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Python
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# Test cases for DFS
# Copyright (c) 2013, Jouni Malinen <j@w1.fi>
#
# This software may be distributed under the terms of the BSD license.
# See README for more details.
import os
import subprocess
import time
import logging
logger = logging.getLogger()
import hwsim_utils
import hostapd
def wait_dfs_event(hapd, event, timeout):
dfs_events = [ "DFS-RADAR-DETECTED", "DFS-NEW-CHANNEL",
"DFS-CAC-START", "DFS-CAC-COMPLETED",
"DFS-NOP-FINISHED", "AP-ENABLED", "AP-CSA-FINISHED" ]
ev = hapd.wait_event(dfs_events, timeout=timeout)
if not ev:
raise Exception("DFS event timed out")
if event and event not in ev:
raise Exception("Unexpected DFS event")
return ev
def start_dfs_ap(ap, allow_failure=False, ssid="dfs", ht40=False, vht80=False, vht20=False, chanlist=None):
ifname = ap['ifname']
logger.info("Starting AP " + ifname + " on DFS channel")
hapd_global = hostapd.HostapdGlobal()
hapd_global.remove(ifname)
hapd_global.add(ifname)
hapd = hostapd.Hostapd(ifname)
if not hapd.ping():
raise Exception("Could not ping hostapd")
hapd.set_defaults()
hapd.set("ssid", ssid)
hapd.set("country_code", "FI")
hapd.set("ieee80211d", "1")
hapd.set("ieee80211h", "1")
hapd.set("hw_mode", "a")
hapd.set("channel", "52")
if ht40:
hapd.set("ht_capab", "[HT40+]")
if vht80:
hapd.set("ieee80211ac", "1")
hapd.set("vht_oper_chwidth", "1")
hapd.set("vht_oper_centr_freq_seg0_idx", "58")
if vht20:
hapd.set("ieee80211ac", "1")
hapd.set("vht_oper_chwidth", "0")
hapd.set("vht_oper_centr_freq_seg0_idx", "0")
if chanlist:
hapd.set("chanlist", chanlist)
hapd.enable()
ev = wait_dfs_event(hapd, "DFS-CAC-START", 5)
if "DFS-CAC-START" not in ev:
raise Exception("Unexpected DFS event")
state = hapd.get_status_field("state")
if state != "DFS":
if allow_failure:
logger.info("Interface state not DFS: " + state)
return None
raise Exception("Unexpected interface state: " + state)
return hapd
def dfs_simulate_radar(hapd):
logger.info("Trigger a simulated radar event")
phyname = hapd.get_driver_status_field("phyname")
radar_file = '/sys/kernel/debug/ieee80211/' + phyname + '/hwsim/dfs_simulate_radar'
with open(radar_file, 'w') as f:
f.write('1')
def test_dfs(dev, apdev):
"""DFS CAC functionality on clear channel"""
try:
hapd = start_dfs_ap(apdev[0], allow_failure=True)
if hapd is None:
if not os.path.exists("dfs"):
return "skip"
raise Exception("Failed to start DFS AP")
ev = wait_dfs_event(hapd, "DFS-CAC-COMPLETED", 70)
if "success=1" not in ev:
raise Exception("CAC failed")
if "freq=5260" not in ev:
raise Exception("Unexpected DFS freq result")
ev = hapd.wait_event(["AP-ENABLED"], timeout=5)
if not ev:
raise Exception("AP setup timed out")
state = hapd.get_status_field("state")
if state != "ENABLED":
raise Exception("Unexpected interface state")
freq = hapd.get_status_field("freq")
if freq != "5260":
raise Exception("Unexpected frequency")
dev[0].connect("dfs", key_mgmt="NONE")
hwsim_utils.test_connectivity(dev[0], hapd)
hapd.request("RADAR DETECTED freq=5260 ht_enabled=1 chan_width=1")
ev = hapd.wait_event(["DFS-RADAR-DETECTED"], timeout=10)
if ev is None:
raise Exception("DFS-RADAR-DETECTED event not reported")
if "freq=5260" not in ev:
raise Exception("Incorrect frequency in radar detected event: " + ev);
ev = hapd.wait_event(["DFS-NEW-CHANNEL"], timeout=70)
if ev is None:
raise Exception("DFS-NEW-CHANNEL event not reported")
if "freq=5260" in ev:
raise Exception("Channel did not change after radar was detected");
ev = hapd.wait_event(["AP-CSA-FINISHED"], timeout=70)
if ev is None:
raise Exception("AP-CSA-FINISHED event not reported")
if "freq=5260" in ev:
raise Exception("Channel did not change after radar was detected(2)");
time.sleep(1)
hwsim_utils.test_connectivity(dev[0], hapd)
finally:
dev[0].request("DISCONNECT")
if hapd:
hapd.request("DISABLE")
subprocess.call(['sudo', 'iw', 'reg', 'set', '00'])
dev[0].flush_scan_cache()
def test_dfs_radar(dev, apdev):
"""DFS CAC functionality with radar detected"""
try:
hapd2 = None
hapd = start_dfs_ap(apdev[0])
if hapd is None:
if not os.path.exists("dfs"):
return "skip"
raise Exception("Failed to start DFS AP")
time.sleep(1)
dfs_simulate_radar(hapd)
hapd2 = start_dfs_ap(apdev[1], ssid="dfs2", ht40=True)
ev = wait_dfs_event(hapd, "DFS-CAC-COMPLETED", 5)
if ev is None:
raise Exception("Timeout on DFS aborted event")
if "success=0 freq=5260" not in ev:
raise Exception("Unexpected DFS aborted event contents: " + ev)
ev = wait_dfs_event(hapd, "DFS-RADAR-DETECTED", 5)
if "freq=5260" not in ev:
raise Exception("Unexpected DFS radar detection freq")
ev = wait_dfs_event(hapd, "DFS-NEW-CHANNEL", 5)
if "freq=5260" in ev:
raise Exception("Unexpected DFS new freq")
ev = wait_dfs_event(hapd, None, 5)
if "AP-ENABLED" in ev:
logger.info("Started AP on non-DFS channel")
else:
logger.info("Trying to start AP on another DFS channel")
if "DFS-CAC-START" not in ev:
raise Exception("Unexpected DFS event")
if "freq=5260" in ev:
raise Exception("Unexpected DFS CAC freq")
ev = wait_dfs_event(hapd, "DFS-CAC-COMPLETED", 70)
if "success=1" not in ev:
raise Exception("CAC failed")
if "freq=5260" in ev:
raise Exception("Unexpected DFS freq result - radar channel")
ev = hapd.wait_event(["AP-ENABLED"], timeout=5)
if not ev:
raise Exception("AP setup timed out")
state = hapd.get_status_field("state")
if state != "ENABLED":
raise Exception("Unexpected interface state")
freq = hapd.get_status_field("freq")
if freq == "5260":
raise Exception("Unexpected frequency: " + freq)
dev[0].connect("dfs", key_mgmt="NONE")
ev = hapd2.wait_event(["AP-ENABLED"], timeout=70)
if not ev:
raise Exception("AP2 setup timed out")
dfs_simulate_radar(hapd2)
ev = wait_dfs_event(hapd2, "DFS-RADAR-DETECTED", 5)
if "freq=5260 ht_enabled=1 chan_offset=1 chan_width=2" not in ev:
raise Exception("Unexpected DFS radar detection freq from AP2")
ev = wait_dfs_event(hapd2, "DFS-NEW-CHANNEL", 5)
if "freq=5260" in ev:
raise Exception("Unexpected DFS new freq for AP2")
wait_dfs_event(hapd2, None, 5)
finally:
dev[0].request("DISCONNECT")
if hapd:
hapd.request("DISABLE")
if hapd2:
hapd2.request("DISABLE")
subprocess.call(['sudo', 'iw', 'reg', 'set', '00'])
dev[0].flush_scan_cache()
def test_dfs_radar_on_non_dfs_channel(dev, apdev):
"""DFS radar detection test code on non-DFS channel"""
params = { "ssid": "radar" }
hapd = hostapd.add_ap(apdev[0]['ifname'], params)
hapd.request("RADAR DETECTED freq=5260 ht_enabled=1 chan_width=1")
hapd.request("RADAR DETECTED freq=2412 ht_enabled=1 chan_width=1")
def test_dfs_radar_chanlist(dev, apdev):
"""DFS chanlist when radar is detected"""
try:
hapd = start_dfs_ap(apdev[0], chanlist="40 44")
if hapd is None:
if not os.path.exists("dfs"):
return "skip"
raise Exception("Failed to start DFS AP")
time.sleep(1)
dfs_simulate_radar(hapd)
ev = wait_dfs_event(hapd, "DFS-CAC-COMPLETED", 5)
if ev is None:
raise Exception("Timeout on DFS aborted event")
if "success=0 freq=5260" not in ev:
raise Exception("Unexpected DFS aborted event contents: " + ev)
ev = wait_dfs_event(hapd, "DFS-RADAR-DETECTED", 5)
if "freq=5260" not in ev:
raise Exception("Unexpected DFS radar detection freq")
ev = wait_dfs_event(hapd, "DFS-NEW-CHANNEL", 5)
if "freq=5200 chan=40" not in ev and "freq=5220 chan=44" not in ev:
raise Exception("Unexpected DFS new freq: " + ev)
ev = wait_dfs_event(hapd, None, 5)
if "AP-ENABLED" not in ev:
raise Exception("Unexpected DFS event")
dev[0].connect("dfs", key_mgmt="NONE")
finally:
dev[0].request("DISCONNECT")
if hapd:
hapd.request("DISABLE")
subprocess.call(['sudo', 'iw', 'reg', 'set', '00'])
dev[0].flush_scan_cache()
def test_dfs_radar_chanlist_vht80(dev, apdev):
"""DFS chanlist when radar is detected and VHT80 configured"""
try:
hapd = start_dfs_ap(apdev[0], chanlist="36", ht40=True, vht80=True)
if hapd is None:
if not os.path.exists("dfs"):
return "skip"
raise Exception("Failed to start DFS AP")
time.sleep(1)
dfs_simulate_radar(hapd)
ev = wait_dfs_event(hapd, "DFS-CAC-COMPLETED", 5)
if ev is None:
raise Exception("Timeout on DFS aborted event")
if "success=0 freq=5260" not in ev:
raise Exception("Unexpected DFS aborted event contents: " + ev)
ev = wait_dfs_event(hapd, "DFS-RADAR-DETECTED", 5)
if "freq=5260" not in ev:
raise Exception("Unexpected DFS radar detection freq")
ev = wait_dfs_event(hapd, "DFS-NEW-CHANNEL", 5)
if "freq=5180 chan=36 sec_chan=1" not in ev:
raise Exception("Unexpected DFS new freq: " + ev)
ev = wait_dfs_event(hapd, None, 5)
if "AP-ENABLED" not in ev:
raise Exception("Unexpected DFS event")
dev[0].connect("dfs", key_mgmt="NONE")
if hapd.get_status_field('vht_oper_centr_freq_seg0_idx') != "42":
raise Exception("Unexpected seg0 idx")
finally:
dev[0].request("DISCONNECT")
if hapd:
hapd.request("DISABLE")
subprocess.call(['sudo', 'iw', 'reg', 'set', '00'])
dev[0].flush_scan_cache()
def test_dfs_radar_chanlist_vht20(dev, apdev):
"""DFS chanlist when radar is detected and VHT40 configured"""
try:
hapd = start_dfs_ap(apdev[0], chanlist="36", vht20=True)
if hapd is None:
if not os.path.exists("dfs"):
return "skip"
raise Exception("Failed to start DFS AP")
time.sleep(1)
dfs_simulate_radar(hapd)
ev = wait_dfs_event(hapd, "DFS-CAC-COMPLETED", 5)
if ev is None:
raise Exception("Timeout on DFS aborted event")
if "success=0 freq=5260" not in ev:
raise Exception("Unexpected DFS aborted event contents: " + ev)
ev = wait_dfs_event(hapd, "DFS-RADAR-DETECTED", 5)
if "freq=5260" not in ev:
raise Exception("Unexpected DFS radar detection freq")
ev = wait_dfs_event(hapd, "DFS-NEW-CHANNEL", 5)
if "freq=5180 chan=36 sec_chan=0" not in ev:
raise Exception("Unexpected DFS new freq: " + ev)
ev = wait_dfs_event(hapd, None, 5)
if "AP-ENABLED" not in ev:
raise Exception("Unexpected DFS event")
dev[0].connect("dfs", key_mgmt="NONE")
finally:
dev[0].request("DISCONNECT")
if hapd:
hapd.request("DISABLE")
subprocess.call(['sudo', 'iw', 'reg', 'set', '00'])
dev[0].flush_scan_cache()
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