# Test cases for dynamic BSS changes with hostapd
# Copyright (c) 2013, Qualcomm Atheros, Inc.
#
# This software may be distributed under the terms of the BSD license.
# See README for more details.
from remotehost import remote_compatible
import time
import subprocess
import logging
logger = logging.getLogger()
import os
import hwsim_utils
import hostapd
from utils import alloc_fail, require_under_vm, get_phy
from test_ap_acs import force_prev_ap_on_24g
@remote_compatible
def test_ap_change_ssid(dev, apdev):
"""Dynamic SSID change with hostapd and WPA2-PSK"""
params = hostapd.wpa2_params(ssid="test-wpa2-psk-start",
passphrase="12345678")
hapd = hostapd.add_ap(apdev[0], params)
id = dev[0].connect("test-wpa2-psk-start", psk="12345678",
scan_freq="2412")
dev[0].request("DISCONNECT")
logger.info("Change SSID dynamically")
res = hapd.request("SET ssid test-wpa2-psk-new")
if "OK" not in res:
raise Exception("SET command failed")
res = hapd.request("RELOAD")
if "OK" not in res:
raise Exception("RELOAD command failed")
dev[0].set_network_quoted(id, "ssid", "test-wpa2-psk-new")
dev[0].connect_network(id)
def multi_check(dev, check, scan_opt=True):
id = []
num_bss = len(check)
for i in range(0, num_bss):
dev[i].request("BSS_FLUSH 0")
dev[i].dump_monitor()
for i in range(0, num_bss):
if check[i]:
continue
id.append(dev[i].connect("bss-" + str(i + 1), key_mgmt="NONE",
scan_freq="2412", wait_connect=False))
for i in range(num_bss):
if not check[i]:
continue
bssid = '02:00:00:00:03:0' + str(i)
if scan_opt:
dev[i].scan_for_bss(bssid, freq=2412)
id.append(dev[i].connect("bss-" + str(i + 1), key_mgmt="NONE",
scan_freq="2412", wait_connect=True))
first = True
for i in range(num_bss):
if not check[i]:
timeout = 0.2 if first else 0.01
first = False
ev = dev[i].wait_event(["CTRL-EVENT-CONNECTED"], timeout=timeout)
if ev:
raise Exception("Unexpected connection")
for i in range(0, num_bss):
dev[i].remove_network(id[i])
for i in range(num_bss):
if check[i]:
dev[i].wait_disconnected(timeout=5)
res = ''
for i in range(0, num_bss):
res = res + dev[i].request("BSS RANGE=ALL MASK=0x2")
for i in range(0, num_bss):
if not check[i]:
bssid = '02:00:00:00:03:0' + str(i)
if bssid in res:
raise Exception("Unexpected BSS" + str(i) + " in scan results")
def test_ap_bss_add_remove(dev, apdev):
"""Dynamic BSS add/remove operations with hostapd"""
try:
_test_ap_bss_add_remove(dev, apdev)
finally:
for i in range(3):
dev[i].request("SCAN_INTERVAL 5")
def _test_ap_bss_add_remove(dev, apdev):
for i in range(3):
dev[i].flush_scan_cache()
dev[i].request("SCAN_INTERVAL 1")
ifname1 = apdev[0]['ifname']
ifname2 = apdev[0]['ifname'] + '-2'
ifname3 = apdev[0]['ifname'] + '-3'
logger.info("Set up three BSSes one by one")
hostapd.add_bss(apdev[0], ifname1, 'bss-1.conf')
multi_check(dev, [True, False, False])
hostapd.add_bss(apdev[0], ifname2, 'bss-2.conf')
multi_check(dev, [True, True, False])
hostapd.add_bss(apdev[0], ifname3, 'bss-3.conf')
multi_check(dev, [True, True, True])
logger.info("Remove the last BSS and re-add it")
hostapd.remove_bss(apdev[0], ifname3)
multi_check(dev, [True, True, False])
hostapd.add_bss(apdev[0], ifname3, 'bss-3.conf')
multi_check(dev, [True, True, True])
logger.info("Remove the middle BSS and re-add it")
hostapd.remove_bss(apdev[0], ifname2)
multi_check(dev, [True, False, True])
hostapd.add_bss(apdev[0], ifname2, 'bss-2.conf')
multi_check(dev, [True, True, True])
logger.info("Remove the first BSS and re-add it and other BSSs")
hostapd.remove_bss(apdev[0], ifname1)
multi_check(dev, [False, False, False])
hostapd.add_bss(apdev[0], ifname1, 'bss-1.conf')
hostapd.add_bss(apdev[0], ifname2, 'bss-2.conf')
hostapd.add_bss(apdev[0], ifname3, 'bss-3.conf')
multi_check(dev, [True, True, True])
logger.info("Remove two BSSes and re-add them")
hostapd.remove_bss(apdev[0], ifname2)
multi_check(dev, [True, False, True])
hostapd.remove_bss(apdev[0], ifname3)
multi_check(dev, [True, False, False])
hostapd.add_bss(apdev[0], ifname2, 'bss-2.conf')
multi_check(dev, [True, True, False])
hostapd.add_bss(apdev[0], ifname3, 'bss-3.conf')
multi_check(dev, [True, True, True])
logger.info("Remove three BSSes in and re-add them")
hostapd.remove_bss(apdev[0], ifname3)
multi_check(dev, [True, True, False])
hostapd.remove_bss(apdev[0], ifname2)
multi_check(dev, [True, False, False])
hostapd.remove_bss(apdev[0], ifname1)
multi_check(dev, [False, False, False])
hostapd.add_bss(apdev[0], ifname1, 'bss-1.conf')
multi_check(dev, [True, False, False])
hostapd.add_bss(apdev[0], ifname2, 'bss-2.conf')
multi_check(dev, [True, True, False])
hostapd.add_bss(apdev[0], ifname3, 'bss-3.conf')
multi_check(dev, [True, True, True])
logger.info("Test error handling if a duplicate ifname is tried")
hostapd.add_bss(apdev[0], ifname3, 'bss-3.conf', ignore_error=True)
multi_check(dev, [True, True, True])
def test_ap_bss_add_remove_during_ht_scan(dev, apdev):
"""Dynamic BSS add during HT40 co-ex scan"""
for i in range(3):
dev[i].flush_scan_cache()
ifname1 = apdev[0]['ifname']
ifname2 = apdev[0]['ifname'] + '-2'
hostapd.add_bss(apdev[0], ifname1, 'bss-ht40-1.conf')
hostapd.add_bss(apdev[0], ifname2, 'bss-ht40-2.conf')
multi_check(dev, [True, True], scan_opt=False)
hostapd.remove_bss(apdev[0], ifname2)
hostapd.remove_bss(apdev[0], ifname1)
hostapd.add_bss(apdev[0], ifname1, 'bss-ht40-1.conf')
hostapd.add_bss(apdev[0], ifname2, 'bss-ht40-2.conf')
hostapd.remove_bss(apdev[0], ifname2)
multi_check(dev, [True, False], scan_opt=False)
hostapd.remove_bss(apdev[0], ifname1)
hostapd.add_bss(apdev[0], ifname1, 'bss-ht40-1.conf')
hostapd.add_bss(apdev[0], ifname2, 'bss-ht40-2.conf')
hostapd.remove_bss(apdev[0], ifname1)
multi_check(dev, [False, False])
def test_ap_multi_bss_config(dev, apdev):
"""hostapd start with a multi-BSS configuration file"""
for i in range(3):
dev[i].flush_scan_cache()
ifname1 = apdev[0]['ifname']
ifname2 = apdev[0]['ifname'] + '-2'
ifname3 = apdev[0]['ifname'] + '-3'
logger.info("Set up three BSSes with one configuration file")
hapd = hostapd.add_iface(apdev[0], 'multi-bss.conf')
hapd.enable()
multi_check(dev, [True, True, True])
hostapd.remove_bss(apdev[0], ifname2)
multi_check(dev, [True, False, True])
hostapd.remove_bss(apdev[0], ifname3)
multi_check(dev, [True, False, False])
hostapd.remove_bss(apdev[0], ifname1)
multi_check(dev, [False, False, False])
hapd = hostapd.add_iface(apdev[0], 'multi-bss.conf')
hapd.enable()
hostapd.remove_bss(apdev[0], ifname1)
multi_check(dev, [False, False, False])
def invalid_ap(ap):
logger.info("Trying to start AP " + ap['ifname'] + " with invalid configuration")
hapd = hostapd.add_ap(ap, {}, no_enable=True)
hapd.set("ssid", "invalid-config")
hapd.set("channel", "12345")
try:
hapd.enable()
started = True
except Exception as e:
started = False
if started:
raise Exception("ENABLE command succeeded unexpectedly")
return hapd
@remote_compatible
def test_ap_invalid_config(dev, apdev):
"""Try to start AP with invalid configuration and fix configuration"""
hapd = invalid_ap(apdev[0])
logger.info("Fix configuration and start AP again")
hapd.set("channel", "1")
hapd.enable()
dev[0].connect("invalid-config", key_mgmt="NONE", scan_freq="2412")
@remote_compatible
def test_ap_invalid_config2(dev, apdev):
"""Try to start AP with invalid configuration and remove interface"""
hapd = invalid_ap(apdev[0])
logger.info("Remove interface with failed configuration")
hostapd.remove_bss(apdev[0])
def test_ap_remove_during_acs(dev, apdev):
"""Remove interface during ACS"""
force_prev_ap_on_24g(apdev[0])
params = hostapd.wpa2_params(ssid="test-acs-remove", passphrase="12345678")
params['channel'] = '0'
hostapd.add_ap(apdev[0], params)
hostapd.remove_bss(apdev[0])
def test_ap_remove_during_acs2(dev, apdev):
"""Remove BSS during ACS in multi-BSS configuration"""
force_prev_ap_on_24g(apdev[0])
ifname = apdev[0]['ifname']
ifname2 = ifname + "-2"
hapd = hostapd.add_ap(apdev[0], {}, no_enable=True)
hapd.set("ssid", "test-acs-remove")
hapd.set("channel", "0")
hapd.set("bss", ifname2)
hapd.set("ssid", "test-acs-remove2")
hapd.enable()
hostapd.remove_bss(apdev[0])
def test_ap_remove_during_acs3(dev, apdev):
"""Remove second BSS during ACS in multi-BSS configuration"""
force_prev_ap_on_24g(apdev[0])
ifname = apdev[0]['ifname']
ifname2 = ifname + "-2"
hapd = hostapd.add_ap(apdev[0], {}, no_enable=True)
hapd.set("ssid", "test-acs-remove")
hapd.set("channel", "0")
hapd.set("bss", ifname2)
hapd.set("ssid", "test-acs-remove2")
hapd.enable()
hostapd.remove_bss(apdev[0], ifname2)
@remote_compatible
def test_ap_remove_during_ht_coex_scan(dev, apdev):
"""Remove interface during HT co-ex scan"""
params = hostapd.wpa2_params(ssid="test-ht-remove", passphrase="12345678")
params['channel'] = '1'
params['ht_capab'] = "[HT40+]"
ifname = apdev[0]['ifname']
hostapd.add_ap(apdev[0], params)
hostapd.remove_bss(apdev[0])
def test_ap_remove_during_ht_coex_scan2(dev, apdev):
"""Remove BSS during HT co-ex scan in multi-BSS configuration"""
ifname = apdev[0]['ifname']
ifname2 = ifname + "-2"
hapd = hostapd.add_ap(apdev[0], {}, no_enable=True)
hapd.set("ssid", "test-ht-remove")
hapd.set("channel", "1")
hapd.set("ht_capab", "[HT40+]")
hapd.set("bss", ifname2)
hapd.set("ssid", "test-ht-remove2")
hapd.enable()
hostapd.remove_bss(apdev[0])
def test_ap_remove_during_ht_coex_scan3(dev, apdev):
"""Remove second BSS during HT co-ex scan in multi-BSS configuration"""
ifname = apdev[0]['ifname']
ifname2 = ifname + "-2"
hapd = hostapd.add_ap(apdev[0], {}, no_enable=True)
hapd.set("ssid", "test-ht-remove")
hapd.set("channel", "1")
hapd.set("ht_capab", "[HT40+]")
hapd.set("bss", ifname2)
hapd.set("ssid", "test-ht-remove2")
hapd.enable()
hostapd.remove_bss(apdev[0], ifname2)
@remote_compatible
def test_ap_enable_disable_reenable(dev, apdev):
"""Enable, disable, re-enable AP"""
hapd = hostapd.add_ap(apdev[0], {}, no_enable=True)
hapd.set("ssid", "dynamic")
hapd.enable()
ev = hapd.wait_event(["AP-ENABLED"], timeout=30)
if ev is None:
raise Exception("AP startup timed out")
dev[0].connect("dynamic", key_mgmt="NONE", scan_freq="2412")
hapd.disable()
ev = hapd.wait_event(["AP-DISABLED"], timeout=30)
if ev is None:
raise Exception("AP disabling timed out")
dev[0].wait_disconnected(timeout=10)
hapd.enable()
ev = hapd.wait_event(["AP-ENABLED"], timeout=30)
if ev is None:
raise Exception("AP startup timed out")
dev[1].connect("dynamic", key_mgmt="NONE", scan_freq="2412")
dev[0].wait_connected(timeout=10)
def test_ap_double_disable(dev, apdev):
"""Double DISABLE regression test"""
hapd = hostapd.add_bss(apdev[0], apdev[0]['ifname'], 'bss-1.conf')
hostapd.add_bss(apdev[0], apdev[0]['ifname'] + '-2', 'bss-2.conf')
hapd.disable()
if "FAIL" not in hapd.request("DISABLE"):
raise Exception("Second DISABLE accepted unexpectedly")
hapd.enable()
hapd.disable()
if "FAIL" not in hapd.request("DISABLE"):
raise Exception("Second DISABLE accepted unexpectedly")
def test_ap_bss_add_many(dev, apdev):
"""Large number of BSS add operations with hostapd"""
try:
_test_ap_bss_add_many(dev, apdev)
finally:
dev[0].request("SCAN_INTERVAL 5")
ifname = apdev[0]['ifname']
hapd = hostapd.HostapdGlobal(apdev[0])
hapd.flush()
for i in range(16):
ifname2 = ifname + '-' + str(i)
hapd.remove(ifname2)
try:
os.remove('/tmp/hwsim-bss.conf')
except:
pass
def _test_ap_bss_add_many(dev, apdev):
ifname = apdev[0]['ifname']
hostapd.add_bss(apdev[0], ifname, 'bss-1.conf')
fname = '/tmp/hwsim-bss.conf'
for i in range(16):
ifname2 = ifname + '-' + str(i)
with open(fname, 'w') as f:
f.write("driver=nl80211\n")
f.write("hw_mode=g\n")
f.write("channel=1\n")
f.write("ieee80211n=1\n")
f.write("interface=%s\n" % ifname2)
f.write("bssid=02:00:00:00:03:%02x\n" % (i + 1))
f.write("ctrl_interface=/var/run/hostapd\n")
f.write("ssid=test-%d\n" % i)
hostapd.add_bss(apdev[0], ifname2, fname)
os.remove(fname)
dev[0].request("SCAN_INTERVAL 1")
dev[0].connect("bss-1", key_mgmt="NONE", scan_freq="2412")
dev[0].request("DISCONNECT")
dev[0].wait_disconnected(timeout=5)
for i in range(16):
dev[0].connect("test-%d" % i, key_mgmt="NONE", scan_freq="2412")
dev[0].request("DISCONNECT")
dev[0].wait_disconnected(timeout=5)
ifname2 = ifname + '-' + str(i)
hostapd.remove_bss(apdev[0], ifname2)
def test_ap_bss_add_reuse_existing(dev, apdev):
"""Dynamic BSS add operation reusing existing interface"""
ifname1 = apdev[0]['ifname']
ifname2 = apdev[0]['ifname'] + '-2'
hostapd.add_bss(apdev[0], ifname1, 'bss-1.conf')
subprocess.check_call(["iw", "dev", ifname1, "interface", "add", ifname2,
"type", "__ap"])
hostapd.add_bss(apdev[0], ifname2, 'bss-2.conf')
hostapd.remove_bss(apdev[0], ifname2)
subprocess.check_call(["iw", "dev", ifname2, "del"])
def hapd_bss_out_of_mem(hapd, phy, confname, count, func):
with alloc_fail(hapd, count, func):
hapd_global = hostapd.HostapdGlobal()
res = hapd_global.ctrl.request("ADD bss_config=" + phy + ":" + confname)
if "OK" in res:
raise Exception("add_bss succeeded")
def test_ap_bss_add_out_of_memory(dev, apdev):
"""Running out of memory while adding a BSS"""
hapd2 = hostapd.add_ap(apdev[1], {"ssid": "open"})
ifname1 = apdev[0]['ifname']
ifname2 = apdev[0]['ifname'] + '-2'
hapd_bss_out_of_mem(hapd2, 'phy3', 'bss-1.conf', 1, 'hostapd_add_iface')
for i in range(1, 3):
hapd_bss_out_of_mem(hapd2, 'phy3', 'bss-1.conf',
i, 'hostapd_interface_init_bss')
hapd_bss_out_of_mem(hapd2, 'phy3', 'bss-1.conf',
1, 'ieee802_11_build_ap_params')
hostapd.add_bss(apdev[0], ifname1, 'bss-1.conf')
hapd_bss_out_of_mem(hapd2, 'phy3', 'bss-2.conf',
1, 'hostapd_interface_init_bss')
hapd_bss_out_of_mem(hapd2, 'phy3', 'bss-2.conf',
1, 'ieee802_11_build_ap_params')
hostapd.add_bss(apdev[0], ifname2, 'bss-2.conf')
hostapd.remove_bss(apdev[0], ifname2)
hostapd.remove_bss(apdev[0], ifname1)
def test_ap_multi_bss(dev, apdev):
"""Multiple BSSes with hostapd"""
ifname1 = apdev[0]['ifname']
ifname2 = apdev[0]['ifname'] + '-2'
hapd1 = hostapd.add_bss(apdev[0], ifname1, 'bss-1.conf')
hapd2 = hostapd.add_bss(apdev[0], ifname2, 'bss-2.conf')
dev[0].connect("bss-1", key_mgmt="NONE", scan_freq="2412")
dev[1].connect("bss-2", key_mgmt="NONE", scan_freq="2412")
hwsim_utils.test_connectivity(dev[0], hapd1)
hwsim_utils.test_connectivity(dev[1], hapd2)
sta0 = hapd1.get_sta(dev[0].own_addr())
sta1 = hapd2.get_sta(dev[1].own_addr())
if 'rx_packets' not in sta0 or int(sta0['rx_packets']) < 1:
raise Exception("sta0 did not report receiving packets")
if 'rx_packets' not in sta1 or int(sta1['rx_packets']) < 1:
raise Exception("sta1 did not report receiving packets")
@remote_compatible
def test_ap_add_with_driver(dev, apdev):
"""Add hostapd interface with driver specified"""
ifname = apdev[0]['ifname']
try:
hostname = apdev[0]['hostname']
except:
hostname = None
hapd_global = hostapd.HostapdGlobal(apdev[0])
hapd_global.add(ifname, driver="nl80211")
port = hapd_global.get_ctrl_iface_port(ifname)
hapd = hostapd.Hostapd(ifname, hostname, port)
hapd.set_defaults()
hapd.set("ssid", "dynamic")
hapd.enable()
ev = hapd.wait_event(["AP-ENABLED"], timeout=30)
if ev is None:
raise Exception("AP startup timed out")
dev[0].connect("dynamic", key_mgmt="NONE", scan_freq="2412")
dev[0].request("DISCONNECT")
dev[0].wait_disconnected()
hapd.disable()
def test_ap_iapp(dev, apdev):
"""IAPP and multiple BSSes"""
require_under_vm()
try:
_test_ap_iapp(dev, apdev)
finally:
subprocess.call(['ifconfig', 'br-multicast', 'down'],
stderr=open('/dev/null', 'w'))
subprocess.call(['brctl', 'delbr', 'br-multicast'],
stderr=open('/dev/null', 'w'))
def _test_ap_iapp(dev, apdev):
br_ifname = 'br-multicast'
subprocess.call(['brctl', 'addbr', br_ifname])
subprocess.call(['brctl', 'setfd', br_ifname, '0'])
subprocess.call(['ip', 'addr', 'add', '10.174.65.206/31', 'dev', br_ifname])
subprocess.call(['ip', 'link', 'set', 'dev', br_ifname, 'up'])
subprocess.call(['ip', 'route', 'add', '224.0.0.0/4', 'dev', br_ifname])
params = {"ssid": "test-1",
"bridge": br_ifname,
"iapp_interface": br_ifname}
hapd = hostapd.add_ap(apdev[0], params)
dev[0].scan_for_bss(apdev[0]['bssid'], freq=2412)
dev[0].connect("test-1", key_mgmt="NONE", scan_freq="2412")
dev[1].connect("test-1", key_mgmt="NONE", scan_freq="2412")
hapd2 = hostapd.add_ap(apdev[1], params)
dev[0].scan_for_bss(apdev[1]['bssid'], freq=2412)
dev[0].roam(apdev[1]['bssid'])
dev[0].roam(apdev[0]['bssid'])
dev[0].request("DISCONNECT")
dev[1].request("DISCONNECT")
dev[0].wait_disconnected()
dev[1].wait_disconnected()
hapd.disable()
hapd2.disable()
def test_ap_duplicate_bssid(dev, apdev):
"""Duplicate BSSID"""
params = {"ssid": "test"}
hapd = hostapd.add_ap(apdev[0], params, no_enable=True)
hapd.enable()
ifname2 = apdev[0]['ifname'] + '-2'
ifname3 = apdev[0]['ifname'] + '-3'
# "BSS 'wlan3-2' may not have BSSID set to the MAC address of the radio"
try:
hostapd.add_bss(apdev[0], ifname2, 'bss-2-dup.conf')
raise Exception("BSS add succeeded unexpectedly")
except Exception as e:
if "Could not add hostapd BSS" in str(e):
pass
else:
raise
hostapd.add_bss(apdev[0], ifname3, 'bss-3.conf')
dev[0].connect("test", key_mgmt="NONE", scan_freq="2412")
dev[0].request("DISCONNECT")
dev[0].wait_disconnected()
hapd.set("bssid", "02:00:00:00:03:02")
hapd.disable()
# "Duplicate BSSID 02:00:00:00:03:02 on interface 'wlan3-3' and 'wlan3'."
if "FAIL" not in hapd.request("ENABLE"):
raise Exception("ENABLE with duplicate BSSID succeeded unexpectedly")
def test_ap_bss_config_file(dev, apdev, params):
"""hostapd BSS config file"""
pidfile = os.path.join(params['logdir'], "ap_bss_config_file-hostapd.pid")
logfile = os.path.join(params['logdir'], "ap_bss_config_file-hostapd-log")
prg = os.path.join(params['logdir'], 'alt-hostapd/hostapd/hostapd')
if not os.path.exists(prg):
prg = '../../hostapd/hostapd'
phy = get_phy(apdev[0])
cmd = [prg, '-B', '-dddt', '-P', pidfile, '-f', logfile, '-S', '-T',
'-b', phy + ':bss-1.conf', '-b', phy + ':bss-2.conf',
'-b', phy + ':bss-3.conf']
res = subprocess.check_call(cmd)
if res != 0:
raise Exception("Could not start hostapd: %s" % str(res))
multi_check(dev, [True, True, True])
for i in range(0, 3):
dev[i].request("DISCONNECT")
hapd = hostapd.Hostapd(apdev[0]['ifname'])
hapd.ping()
if "OK" not in hapd.request("TERMINATE"):
raise Exception("Failed to terminate hostapd process")
ev = hapd.wait_event(["CTRL-EVENT-TERMINATING"], timeout=15)
if ev is None:
raise Exception("CTRL-EVENT-TERMINATING not seen")
for i in range(30):
time.sleep(0.1)
if not os.path.exists(pidfile):
break
if os.path.exists(pidfile):
raise Exception("PID file exits after process termination")