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hostapd/tests/hwsim/test_fst_config.py
Jouni Malinen f27b9277d5 tests: Make FST config tests more robust and easier to debug 
It looks like it is possible for the separate started wpa_supplicant
process to remain running after a test case like fst_sta_config_default.
This would result in failures to run any following test case that uses
the wlan5 interface. Try to kill the process more thoroughly by waiting
for the PID file to show up and write more details into the logs to make
it easier to debug issues in this area.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2016-08-10 17:55:20 +03:00

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# FST configuration tests
# Copyright (c) 2015, Qualcomm Atheros, Inc.
#
# This software may be distributed under the terms of the BSD license.
# See README for more details.
import logging
logger = logging.getLogger()
import subprocess
import time
import os
import signal
import hostapd
import wpasupplicant
import utils
import fst_test_common
class FstLauncherConfig:
"""FstLauncherConfig class represents configuration to be used for
FST config tests related hostapd/wpa_supplicant instances"""
def __init__(self, iface, fst_group, fst_pri, fst_llt=None):
self.iface = iface
self.fst_group = fst_group
self.fst_pri = fst_pri
self.fst_llt = fst_llt # None llt means no llt parameter will be set
def ifname(self):
return self.iface
def is_ap(self):
"""Returns True if the configuration is for AP, otherwise - False"""
raise Exception("Virtual is_ap() called!")
def to_file(self, pathname):
"""Creates configuration file to be used by FST config tests related
hostapd/wpa_supplicant instances"""
raise Exception("Virtual to_file() called!")
class FstLauncherConfigAP(FstLauncherConfig):
"""FstLauncherConfigAP class represents configuration to be used for
FST config tests related hostapd instance"""
def __init__(self, iface, ssid, mode, chan, fst_group, fst_pri,
fst_llt=None):
self.ssid = ssid
self.mode = mode
self.chan = chan
FstLauncherConfig.__init__(self, iface, fst_group, fst_pri, fst_llt)
def is_ap(self):
return True
def get_channel(self):
return self.chan
def to_file(self, pathname):
"""Creates configuration file to be used by FST config tests related
hostapd instance"""
with open(pathname, "w") as f:
f.write("country_code=US\n"
"interface=%s\n"
"ctrl_interface=/var/run/hostapd\n"
"ssid=%s\n"
"channel=%s\n"
"hw_mode=%s\n"
"ieee80211n=1\n" % (self.iface, self.ssid, self.chan,
self.mode))
if len(self.fst_group) != 0:
f.write("fst_group_id=%s\n"
"fst_priority=%s\n" % (self.fst_group, self.fst_pri))
if self.fst_llt is not None:
f.write("fst_llt=%s\n" % self.fst_llt)
with open(pathname, "r") as f:
logger.debug("wrote hostapd config file %s:\n%s" % (pathname,
f.read()))
class FstLauncherConfigSTA(FstLauncherConfig):
"""FstLauncherConfig class represents configuration to be used for
FST config tests related wpa_supplicant instance"""
def __init__(self, iface, fst_group, fst_pri, fst_llt=None):
FstLauncherConfig.__init__(self, iface, fst_group, fst_pri, fst_llt)
def is_ap(self):
return False
def to_file(self, pathname):
"""Creates configuration file to be used by FST config tests related
wpa_supplicant instance"""
with open(pathname, "w") as f:
f.write("ctrl_interface=DIR=/var/run/wpa_supplicant\n"
"p2p_no_group_iface=1\n")
if len(self.fst_group) != 0:
f.write("fst_group_id=%s\n"
"fst_priority=%s\n" % (self.fst_group, self.fst_pri))
if self.fst_llt is not None:
f.write("fst_llt=%s\n" % self.fst_llt)
with open(pathname, "r") as f:
logger.debug("wrote wpa_supplicant config file %s:\n%s" % (pathname, f.read()))
class FstLauncher:
"""FstLauncher class is responsible for launching and cleaning up of FST
config tests related hostapd/wpa_supplicant instances"""
def __init__(self, logpath):
self.logger = logging.getLogger()
self.fst_logpath = logpath
self.cfgs_to_run = []
self.hapd_fst_global = '/var/run/hostapd-fst-global'
self.wsup_fst_global = '/tmp/fststa'
self.nof_aps = 0
self.nof_stas = 0
self.reg_ctrl = fst_test_common.HapdRegCtrl()
self.test_is_supported()
def __del__(self):
self.cleanup()
@staticmethod
def test_is_supported():
h = hostapd.HostapdGlobal()
resp = h.request("FST-MANAGER TEST_REQUEST IS_SUPPORTED")
if not resp.startswith("OK"):
raise utils.HwsimSkip("FST not supported")
w = wpasupplicant.WpaSupplicant(global_iface='/tmp/wpas-wlan5')
resp = w.global_request("FST-MANAGER TEST_REQUEST IS_SUPPORTED")
if not resp.startswith("OK"):
raise utils.HwsimSkip("FST not supported")
def get_cfg_pathname(self, cfg):
"""Returns pathname of ifname based configuration file"""
return self.fst_logpath +'/'+ cfg.ifname() + '.conf'
def add_cfg(self, cfg):
"""Adds configuration to be used for launching hostapd/wpa_supplicant
instances"""
if cfg not in self.cfgs_to_run:
self.cfgs_to_run.append(cfg)
if cfg.is_ap() == True:
self.nof_aps += 1
else:
self.nof_stas += 1
def remove_cfg(self, cfg):
"""Removes configuration previously added with add_cfg"""
if cfg in self.cfgs_to_run:
self.cfgs_to_run.remove(cfg)
if cfg.is_ap() == True:
self.nof_aps -= 1
else:
self.nof_stas -= 1
config_file = self.get_cfg_pathname(cfg)
if os.path.exists(config_file):
os.remove(config_file)
def run_hostapd(self):
"""Lauches hostapd with interfaces configured according to
FstLauncherConfigAP configurations added"""
if self.nof_aps == 0:
raise Exception("No FST APs to start")
pidfile = self.fst_logpath + '/' + 'myhostapd.pid'
mylogfile = self.fst_logpath + '/' + 'fst-hostapd'
prg = os.path.join(self.fst_logpath,
'alt-hostapd/hostapd/hostapd')
if not os.path.exists(prg):
prg = '../../hostapd/hostapd'
cmd = [ prg, '-B', '-dddt',
'-P', pidfile, '-f', mylogfile, '-g', self.hapd_fst_global]
for i in range(0, len(self.cfgs_to_run)):
cfg = self.cfgs_to_run[i]
if cfg.is_ap() == True:
cfgfile = self.get_cfg_pathname(cfg)
cfg.to_file(cfgfile)
cmd.append(cfgfile)
self.reg_ctrl.add_ap(cfg.ifname(), cfg.get_channel())
self.logger.debug("Starting fst hostapd: " + ' '.join(cmd))
res = subprocess.call(cmd)
self.logger.debug("fst hostapd start result: %d" % res)
if res == 0:
self.reg_ctrl.start()
return res
def run_wpa_supplicant(self):
"""Lauches wpa_supplicant with interfaces configured according to
FstLauncherConfigSTA configurations added"""
if self.nof_stas == 0:
raise Exception("No FST STAs to start")
pidfile = self.fst_logpath + '/' + 'mywpa_supplicant.pid'
mylogfile = self.fst_logpath + '/' + 'fst-wpa_supplicant'
prg = os.path.join(self.fst_logpath,
'alt-wpa_supplicant/wpa_supplicant/wpa_supplicant')
if not os.path.exists(prg):
prg = '../../wpa_supplicant/wpa_supplicant'
cmd = [ prg, '-B', '-dddt',
'-P' + pidfile, '-f', mylogfile, '-g', self.wsup_fst_global ]
sta_no = 0
for i in range(0, len(self.cfgs_to_run)):
cfg = self.cfgs_to_run[i]
if cfg.is_ap() == False:
cfgfile = self.get_cfg_pathname(cfg)
cfg.to_file(cfgfile)
cmd.append('-c' + cfgfile)
cmd.append('-i' + cfg.ifname())
cmd.append('-Dnl80211')
if sta_no != self.nof_stas -1:
cmd.append('-N') # Next station configuration
sta_no += 1
self.logger.debug("Starting fst supplicant: " + ' '.join(cmd))
res = subprocess.call(cmd)
self.logger.debug("fst supplicant start result: %d" % res)
return res
def cleanup(self):
"""Terminates hostapd/wpa_supplicant processes previously launched with
run_hostapd/run_wpa_supplicant"""
pidfile = self.fst_logpath + '/' + 'myhostapd.pid'
self.kill_pid(pidfile, self.nof_aps > 0)
pidfile = self.fst_logpath + '/' + 'mywpa_supplicant.pid'
self.kill_pid(pidfile, self.nof_stas > 0)
self.reg_ctrl.stop()
while len(self.cfgs_to_run) != 0:
cfg = self.cfgs_to_run[0]
self.remove_cfg(cfg)
def kill_pid(self, pidfile, try_again=False):
"""Kills process by PID file"""
if not os.path.exists(pidfile):
if not try_again:
return
# It might take some time for the process to write the PID file,
# so wait a bit longer before giving up.
self.logger.info("kill_pid: pidfile %s does not exist - try again after a second" % pidfile)
time.sleep(1)
if not os.path.exists(pidfile):
self.logger.info("kill_pid: pidfile %s does not exist - could not kill the process" % pidfile)
return
pid = -1
try:
pf = file(pidfile, 'r')
pid = int(pf.read().strip())
pf.close()
self.logger.debug("kill_pid %s --> pid %d" % (pidfile, pid))
os.kill(pid, signal.SIGTERM)
for i in range(10):
try:
# Poll the pid (Is the process still existing?)
os.kill(pid, 0)
except OSError:
# No, already done
break
# Wait and check again
time.sleep(1)
except Exception, e:
self.logger.debug("Didn't stop the pid=%d. Was it stopped already? (%s)" % (pid, str(e)))
def parse_ies(iehex, el=-1):
"""Parses the information elements hex string 'iehex' in format
"0a0b0c0d0e0f". If no 'el' defined just checks the IE string for integrity.
If 'el' is defined returns the list of hex values of the specific IE (or
empty list if the element is not in the string."""
iel = [iehex[i:i + 2] for i in range(0, len(iehex), 2)]
for i in range(0, len(iel)):
iel[i] = int(iel[i], 16)
# Sanity check
i = 0
res = []
while i < len(iel):
logger.debug("IE found: %x" % iel[i])
if el != -1 and el == iel[i]:
res = iel[i + 2:i + 2 + iel[i + 1]]
i += 2 + iel[i + 1]
if i != len(iel):
logger.error("Bad IE string: " + iehex)
res = []
return res
def scan_and_get_bss(dev, frq):
"""Issues a scan on given device on given frequency, returns the bss info
dictionary ('ssid','ie','flags', etc.) or None. Note, the function
implies there is only one AP on the given channel. If not a case,
the function must be changed to call dev.get_bss() till the AP with the
[b]ssid that we need is found"""
dev.scan(freq=frq)
return dev.get_bss('0')
# AP configuration tests
def run_test_ap_configuration(apdev, test_params,
fst_group = fst_test_common.fst_test_def_group,
fst_pri = fst_test_common.fst_test_def_prio_high,
fst_llt = fst_test_common.fst_test_def_llt):
"""Runs FST hostapd where the 1st AP configuration is fixed, the 2nd fst
configuration is provided by the parameters. Returns the result of the run:
0 - no errors discovered, an error otherwise. The function is used for
simplek "bad configuration" tests."""
logdir = test_params['logdir']
fst_launcher = FstLauncher(logdir)
ap1 = FstLauncherConfigAP(apdev[0]['ifname'], 'fst_goodconf', 'a',
fst_test_common.fst_test_def_chan_a,
fst_test_common.fst_test_def_group,
fst_test_common.fst_test_def_prio_low,
fst_test_common.fst_test_def_llt)
ap2 = FstLauncherConfigAP(apdev[1]['ifname'], 'fst_badconf', 'b',
fst_test_common.fst_test_def_chan_g, fst_group,
fst_pri, fst_llt)
fst_launcher.add_cfg(ap1)
fst_launcher.add_cfg(ap2)
res = fst_launcher.run_hostapd()
return res
def run_test_sta_configuration(test_params,
fst_group = fst_test_common.fst_test_def_group,
fst_pri = fst_test_common.fst_test_def_prio_high,
fst_llt = fst_test_common.fst_test_def_llt):
"""Runs FST wpa_supplicant where the 1st STA configuration is fixed, the
2nd fst configuration is provided by the parameters. Returns the result of
the run: 0 - no errors discovered, an error otherwise. The function is used
for simple "bad configuration" tests."""
logdir = test_params['logdir']
fst_launcher = FstLauncher(logdir)
sta1 = FstLauncherConfigSTA('wlan5',
fst_test_common.fst_test_def_group,
fst_test_common.fst_test_def_prio_low,
fst_test_common.fst_test_def_llt)
sta2 = FstLauncherConfigSTA('wlan6', fst_group, fst_pri, fst_llt)
fst_launcher.add_cfg(sta1)
fst_launcher.add_cfg(sta2)
res = fst_launcher.run_wpa_supplicant()
return res
def test_fst_ap_config_llt_neg(dev, apdev, test_params):
"""FST AP configuration negative LLT"""
res = run_test_ap_configuration(apdev, test_params, fst_llt = '-1')
if res == 0:
raise Exception("hostapd started with a negative llt")
def test_fst_ap_config_llt_zero(dev, apdev, test_params):
"""FST AP configuration zero LLT"""
res = run_test_ap_configuration(apdev, test_params, fst_llt = '0')
if res == 0:
raise Exception("hostapd started with a zero llt")
def test_fst_ap_config_llt_too_big(dev, apdev, test_params):
"""FST AP configuration LLT is too big"""
res = run_test_ap_configuration(apdev, test_params,
fst_llt = '4294967296') #0x100000000
if res == 0:
raise Exception("hostapd started with llt that is too big")
def test_fst_ap_config_llt_nan(dev, apdev, test_params):
"""FST AP configuration LLT is not a number"""
res = run_test_ap_configuration(apdev, test_params, fst_llt = 'nan')
if res == 0:
raise Exception("hostapd started with llt not a number")
def test_fst_ap_config_pri_neg(dev, apdev, test_params):
"""FST AP configuration Priority negative"""
res = run_test_ap_configuration(apdev, test_params, fst_pri = '-1')
if res == 0:
raise Exception("hostapd started with a negative fst priority")
def test_fst_ap_config_pri_zero(dev, apdev, test_params):
"""FST AP configuration Priority zero"""
res = run_test_ap_configuration(apdev, test_params, fst_pri = '0')
if res == 0:
raise Exception("hostapd started with a zero fst priority")
def test_fst_ap_config_pri_large(dev, apdev, test_params):
"""FST AP configuration Priority too large"""
res = run_test_ap_configuration(apdev, test_params, fst_pri = '256')
if res == 0:
raise Exception("hostapd started with too large fst priority")
def test_fst_ap_config_pri_nan(dev, apdev, test_params):
"""FST AP configuration Priority not a number"""
res = run_test_ap_configuration(apdev, test_params, fst_pri = 'nan')
if res == 0:
raise Exception("hostapd started with fst priority not a number")
def test_fst_ap_config_group_len(dev, apdev, test_params):
"""FST AP configuration Group max length"""
res = run_test_ap_configuration(apdev, test_params,
fst_group = 'fstg5678abcd34567')
if res == 0:
raise Exception("hostapd started with fst_group length too big")
def test_fst_ap_config_good(dev, apdev, test_params):
"""FST AP configuration good parameters"""
res = run_test_ap_configuration(apdev, test_params)
if res != 0:
raise Exception("hostapd didn't start with valid config parameters")
def test_fst_ap_config_default(dev, apdev, test_params):
"""FST AP configuration default parameters"""
res = run_test_ap_configuration(apdev, test_params, fst_llt = None)
if res != 0:
raise Exception("hostapd didn't start with valid config parameters")
# STA configuration tests
def test_fst_sta_config_llt_neg(dev, apdev, test_params):
"""FST STA configuration negative LLT"""
res = run_test_sta_configuration(test_params, fst_llt = '-1')
if res == 0:
raise Exception("wpa_supplicant started with a negative llt")
def test_fst_sta_config_llt_zero(dev, apdev, test_params):
"""FST STA configuration zero LLT"""
res = run_test_sta_configuration(test_params, fst_llt = '0')
if res == 0:
raise Exception("wpa_supplicant started with a zero llt")
def test_fst_sta_config_llt_large(dev, apdev, test_params):
"""FST STA configuration LLT is too large"""
res = run_test_sta_configuration(test_params,
fst_llt = '4294967296') #0x100000000
if res == 0:
raise Exception("wpa_supplicant started with llt that is too large")
def test_fst_sta_config_llt_nan(dev, apdev, test_params):
"""FST STA configuration LLT is not a number"""
res = run_test_sta_configuration(test_params, fst_llt = 'nan')
if res == 0:
raise Exception("wpa_supplicant started with llt not a number")
def test_fst_sta_config_pri_neg(dev, apdev, test_params):
"""FST STA configuration Priority negative"""
res = run_test_sta_configuration(test_params, fst_pri = '-1')
if res == 0:
raise Exception("wpa_supplicant started with a negative fst priority")
def test_fst_sta_config_pri_zero(dev, apdev, test_params):
"""FST STA configuration Priority zero"""
res = run_test_sta_configuration(test_params, fst_pri = '0')
if res == 0:
raise Exception("wpa_supplicant started with a zero fst priority")
def test_fst_sta_config_pri_big(dev, apdev, test_params):
"""FST STA configuration Priority too large"""
res = run_test_sta_configuration(test_params, fst_pri = '256')
if res == 0:
raise Exception("wpa_supplicant started with too large fst priority")
def test_fst_sta_config_pri_nan(dev, apdev, test_params):
"""FST STA configuration Priority not a number"""
res = run_test_sta_configuration(test_params, fst_pri = 'nan')
if res == 0:
raise Exception("wpa_supplicant started with fst priority not a number")
def test_fst_sta_config_group_len(dev, apdev, test_params):
"""FST STA configuration Group max length"""
res = run_test_sta_configuration(test_params,
fst_group = 'fstg5678abcd34567')
if res == 0:
raise Exception("wpa_supplicant started with fst_group length too big")
def test_fst_sta_config_good(dev, apdev, test_params):
"""FST STA configuration good parameters"""
res = run_test_sta_configuration(test_params)
if res != 0:
raise Exception("wpa_supplicant didn't start with valid config parameters")
def test_fst_sta_config_default(dev, apdev, test_params):
"""FST STA configuration default parameters"""
res = run_test_sta_configuration(test_params, fst_llt = None)
if res != 0:
raise Exception("wpa_supplicant didn't start with valid config parameters")
def test_fst_scan_mb(dev, apdev, test_params):
"""FST scan valid MB IE presence with normal start"""
logdir = test_params['logdir']
# Test valid MB IE in scan results
fst_launcher = FstLauncher(logdir)
ap1 = FstLauncherConfigAP(apdev[0]['ifname'], 'fst_11a', 'a',
fst_test_common.fst_test_def_chan_a,
fst_test_common.fst_test_def_group,
fst_test_common.fst_test_def_prio_high)
ap2 = FstLauncherConfigAP(apdev[1]['ifname'], 'fst_11g', 'b',
fst_test_common.fst_test_def_chan_g,
fst_test_common.fst_test_def_group,
fst_test_common.fst_test_def_prio_low)
fst_launcher.add_cfg(ap1)
fst_launcher.add_cfg(ap2)
res = fst_launcher.run_hostapd()
if res != 0:
raise Exception("hostapd didn't start properly")
try:
mbie1=[]
flags1 = ''
mbie2=[]
flags2 = ''
# Scan 1st AP
vals1 = scan_and_get_bss(dev[0], fst_test_common.fst_test_def_freq_a)
if vals1 != None:
if 'ie' in vals1:
mbie1 = parse_ies(vals1['ie'], 0x9e)
if 'flags' in vals1:
flags1 = vals1['flags']
# Scan 2nd AP
vals2 = scan_and_get_bss(dev[2], fst_test_common.fst_test_def_freq_g)
if vals2 != None:
if 'ie' in vals2:
mbie2 = parse_ies(vals2['ie'],0x9e)
if 'flags' in vals2:
flags2 = vals2['flags']
finally:
fst_launcher.cleanup()
if len(mbie1) == 0:
raise Exception("No MB IE created by 1st AP")
if len(mbie2) == 0:
raise Exception("No MB IE created by 2nd AP")
def test_fst_scan_nomb(dev, apdev, test_params):
"""FST scan no MB IE presence with 1 AP start"""
logdir = test_params['logdir']
# Test valid MB IE in scan results
fst_launcher = FstLauncher(logdir)
ap1 = FstLauncherConfigAP(apdev[0]['ifname'], 'fst_11a', 'a',
fst_test_common.fst_test_def_chan_a,
fst_test_common.fst_test_def_group,
fst_test_common.fst_test_def_prio_high)
fst_launcher.add_cfg(ap1)
res = fst_launcher.run_hostapd()
if res != 0:
raise Exception("Hostapd didn't start properly")
try:
time.sleep(2)
mbie1=[]
flags1 = ''
vals1 = scan_and_get_bss(dev[0], fst_test_common.fst_test_def_freq_a)
if vals1 != None:
if 'ie' in vals1:
mbie1 = parse_ies(vals1['ie'], 0x9e)
if 'flags' in vals1:
flags1 = vals1['flags']
finally:
fst_launcher.cleanup()
if len(mbie1) != 0:
raise Exception("MB IE exists with 1 AP")
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