hostap/tests/hwsim/test_dfs.py

182 lines
6.4 KiB
Python
Raw Normal View History

# 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" ]
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):
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", "dfs")
hapd.set("country_code", "FI")
hapd.set("ieee80211d", "1")
hapd.set("ieee80211h", "1")
hapd.set("hw_mode", "a")
hapd.set("channel", "52")
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 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].ifname, apdev[0]['ifname'])
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].ifname, apdev[0]['ifname'])
finally:
subprocess.call(['sudo', 'iw', 'reg', 'set', '00'])
def test_dfs_radar(dev, apdev):
"""DFS CAC functionality with radar detected"""
try:
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)
phyname = hapd.get_driver_status_field("phyname")
radar_file = '/sys/kernel/debug/ieee80211/' + phyname + '/hwsim/dfs_simulate_radar'
cmd = subprocess.Popen(["sudo", "tee", radar_file],
stdin=subprocess.PIPE, stdout=subprocess.PIPE)
cmd.stdin.write("1")
cmd.stdin.close()
cmd.stdout.read()
cmd.stdout.close()
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")
finally:
subprocess.call(['sudo', 'iw', 'reg', 'set', '00'])
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")