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tests: WPA2-Enterprise connection using EAP-PSK after MAC address change

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This is a regression test for a sequence where wpa_supplicant interface
MAC address is changed externally and the ifdown-ifup sequence is
processed only after the interface has already been set UP.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2018-03-30 12:11:55 +03:00
parent 77a020a118
commit c9aba19bd3
1 changed files with 54 additions and 0 deletions
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54
tests/hwsim/test_ap_eap.py
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@ -12,6 +12,7 @@ import subprocess
import logging import logging
logger = logging.getLogger() logger = logging.getLogger()
import os import os
import signal
import socket import socket
import SocketServer import SocketServer
import struct import struct
@ -6365,3 +6366,56 @@ def test_ap_wpa2_eap_wildcard_ssid(dev, apdev):
identity="gpsk user", identity="gpsk user",
password="abcdefghijklmnop0123456789abcdef", password="abcdefghijklmnop0123456789abcdef",
scan_freq="2412") scan_freq="2412")
def test_ap_wpa2_eap_psk_mac_addr_change(dev, apdev):
"""WPA2-Enterprise connection using EAP-PSK after MAC address change"""
params = hostapd.wpa2_eap_params(ssid="test-wpa2-eap")
hapd = hostapd.add_ap(apdev[0], params)
cmd = subprocess.Popen(['ps', '-eo', 'pid,command'], stdout=subprocess.PIPE)
res = cmd.stdout.read()
cmd.stdout.close()
pid = 0
for p in res.splitlines():
if "wpa_supplicant" not in p:
continue
if dev[0].ifname not in p:
continue
pid = int(p.strip().split(' ')[0])
if pid == 0:
logger.info("Could not find wpa_supplicant PID")
else:
logger.info("wpa_supplicant PID %d" % pid)
addr = dev[0].get_status_field("address")
subprocess.call(['ip', 'link', 'set', 'dev', dev[0].ifname, 'down'])
subprocess.call(['ip', 'link', 'set', 'dev', dev[0].ifname, 'address',
'02:11:22:33:44:55'])
subprocess.call(['ip', 'link', 'set', 'dev', dev[0].ifname, 'up'])
addr1 = dev[0].get_status_field("address")
if addr1 != '02:11:22:33:44:55':
raise Exception("Failed to change MAC address")
# Scan using the externally set MAC address, stop the wpa_supplicant
# process to avoid it from processing the ifdown event before the interface
# is already UP, change the MAC address back, allow the wpa_supplicant
# process to continue. This will result in the ifdown + ifup sequence of
# RTM_NEWLINK events to be processed while the interface is already UP.
try:
dev[0].scan_for_bss(apdev[0]['bssid'], freq=2412)
os.kill(pid, signal.SIGSTOP)
time.sleep(0.1)
finally:
subprocess.call(['ip', 'link', 'set', 'dev', dev[0].ifname, 'down'])
subprocess.call(['ip', 'link', 'set', 'dev', dev[0].ifname, 'address',
addr])
subprocess.call(['ip', 'link', 'set', 'dev', dev[0].ifname, 'up'])
time.sleep(0.1)
os.kill(pid, signal.SIGCONT)
eap_connect(dev[0], hapd, "PSK", "psk.user@example.com",
password_hex="0123456789abcdef0123456789abcdef")
addr2 = dev[0].get_status_field("address")
if addr != addr2:
raise Exception("Failed to restore MAC address")