tests: Configure hostapd dynamically during the tests

This makes it more convenient to change hostapd parameters between the
test cases.

Signed-hostap: Jouni Malinen <j@w1.fi>

tests/hwsim/ap-wpa2-psk.conf

@@ -1,15 +0,0 @@
-driver=nl80211
-interface=wlan2
-
-hw_mode=g
-channel=1
-ieee80211n=1
-
-ctrl_interface=/var/run/hostapd
-ctrl_interface_group=admin
-
-ssid=test-wpa2-psk
-wpa=2
-wpa_key_mgmt=WPA-PSK
-wpa_pairwise=CCMP
-wpa_passphrase=12345678

tests/hwsim/hostapd.py

@@ -0,0 +1,72 @@
+#!/usr/bin/python
+#
+# Python class for controlling hostapd
+# 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 time
+import logging
+import wpaspy
+
+logger = logging.getLogger(__name__)
+hapd_ctrl = '/var/run/hostapd'
+hapd_global = 'hostapd-global'
+
+class HostapdGlobal:
+    def __init__(self):
+        self.ctrl = wpaspy.Ctrl(hapd_global)
+
+    def add(self, ifname):
+        res = self.ctrl.request("ADD " + ifname + " " + hapd_ctrl)
+        if not "OK" in res:
+            raise Exception("Could not add hostapd interface " + ifname)
+
+    def remove(self, ifname):
+        self.ctrl.request("REMOVE " + ifname)
+
+
+class Hostapd:
+    def __init__(self, ifname):
+        self.ifname = ifname
+        self.ctrl = wpaspy.Ctrl(os.path.join(hapd_ctrl, ifname))
+
+    def request(self, cmd):
+        logger.debug(self.ifname + ": CTRL: " + cmd)
+        return self.ctrl.request(cmd)
+
+    def ping(self):
+        return "PONG" in self.request("PING")
+
+    def set(self, field, value):
+        logger.debug(self.ifname + ": SET " + field + "=" + value)
+        if not "OK" in self.request("SET " + field + " " + value):
+            raise Exception("Failed to set hostapd parameter " + field)
+
+    def set_defaults(self):
+        self.set("driver", "nl80211")
+        self.set("hw_mode", "g")
+        self.set("channel", "1")
+        self.set("ieee80211n", "1")
+
+    def set_open(self, ssid):
+        self.set_defaults()
+        self.set("ssid", ssid)
+
+    def set_wpa2_psk(self, ssid, passphrase):
+        self.set_defaults()
+        self.set("ssid", ssid)
+        self.set("wpa_passphrase", passphrase)
+        self.set("wpa", "2")
+        self.set("wpa_key_mgmt", "WPA-PSK")
+        self.set("rsn_pairwise", "CCMP")
+
+    def enable(self):
+        if not "OK" in self.ctrl.request("ENABLE"):
+            raise Exception("Failed to enable hostapd interface " + self.ifname)
+
+    def disable(self):
+        if not "OK" in self.ctrl.request("ENABLE"):
+            raise Exception("Failed to disable hostapd interface " + self.ifname)

tests/hwsim/run-ap-tests.py

@@ -1,6 +1,6 @@
 #!/usr/bin/python
 #
-# AP WPA2-PSK tests
+# AP tests
 # Copyright (c) 2013, Jouni Malinen <j@w1.fi>
 #
 # This software may be distributed under the terms of the BSD license.
@@ -14,6 +14,14 @@ import time
 import logging
 
 from wpasupplicant import WpaSupplicant
+from hostapd import HostapdGlobal
+
+def reset_devs(dev, hapd_ifaces):
+        for d in dev:
+            d.reset()
+        hapd = HostapdGlobal()
+        for h in hapd_ifaces:
+            hapd.remove(h)
 
 def main():
     idx = 1
@@ -34,6 +42,7 @@ def main():
     dev0 = WpaSupplicant('wlan0')
     dev1 = WpaSupplicant('wlan1')
     dev = [ dev0, dev1 ]
+    hapd_ifaces = [ 'wlan2', 'wlan3' ]
 
     for d in dev:
         if not d.ping():
@@ -58,8 +67,7 @@ def main():
             #if test_filter not in t.__name__:
             if test_filter != t.__name__:
                 continue
-        for d in dev:
+        reset_devs(dev, hapd_ifaces)
-            d.reset()
         print "START " + t.__name__
         if t.__doc__:
             print "Test: " + t.__doc__
@@ -77,8 +85,7 @@ def main():
             d.request("NOTE TEST-STOP " + t.__name__)
 
     if not test_filter:
-        for d in dev:
+        reset_devs(dev, hapd_ifaces)
-            d.reset()
 
     print "passed tests: " + str(passed)
     print "failed tests: " + str(failed)

tests/hwsim/start-ap.sh

@@ -6,12 +6,12 @@ HAPD=$DIR/../../hostapd/hostapd
 WLANTEST=$DIR/../../wlantest/wlantest
 
 $DIR/stop-wifi.sh
-sudo modprobe mac80211_hwsim radios=3
+sudo modprobe mac80211_hwsim radios=4
 mkdir -p $DIR/logs
 DATE=`date +%s`
 sudo ifconfig hwsim0 up
 sudo $WLANTEST -i hwsim0 -c -d > $DIR/logs/$DATE-hwsim0 &
 sudo $WPAS -Dnl80211 -iwlan0 -c $DIR/p2p0.conf -ddKt > $DIR/logs/$DATE-log0 &
 sudo $WPAS -Dnl80211 -iwlan1 -c $DIR/p2p1.conf -ddKt > $DIR/logs/$DATE-log1 &
-sudo $HAPD -ddKt $DIR/ap-wpa2-psk.conf -ddKt > $DIR/logs/$DATE-log2 &
+sudo $HAPD -ddKt -g $DIR/hostapd-global -G admin -ddKt > $DIR/logs/$DATE-hostapd &
 sleep 1

tests/hwsim/test_ap_tdls.py

@@ -12,6 +12,20 @@ import logging
 logger = logging.getLogger(__name__)
 
 import hwsim_utils
+from hostapd import HostapdGlobal
+from hostapd import Hostapd
+
+ap_ifname = 'wlan2'
+
+def start_ap_wpa2_psk(ifname):
+    logger.info("Starting WPA2-PSK AP " + ifname)
+    hapd_global = HostapdGlobal()
+    hapd_global.add(ifname)
+    hapd = Hostapd(ifname)
+    if not hapd.ping():
+        raise Exception("Could not ping hostapd")
+    hapd.set_wpa2_psk("test-wpa2-psk", "12345678")
+    hapd.enable()
 
 def connect_sta(sta):
     logger.info("Connect STA " + sta.ifname + " to AP")
@@ -109,6 +123,7 @@ def teardown_tdls(sta0, sta1, bssid):
 
 def test_ap_wpa2_tdls(dev):
     """WPA2-PSK AP and two stations using TDLS"""
+    start_ap_wpa2_psk(ap_ifname)
     bssid = "02:00:00:00:02:00"
     wlantest_setup()
     connect_2sta(dev)
@@ -119,6 +134,7 @@ def test_ap_wpa2_tdls(dev):
 
 def test_ap_wpa2_tdls_concurrent_init(dev):
     """Concurrent TDLS setup initiation"""
+    start_ap_wpa2_psk(ap_ifname)
     bssid = "02:00:00:00:02:00"
     wlantest_setup()
     connect_2sta(dev)
@@ -127,6 +143,7 @@ def test_ap_wpa2_tdls_concurrent_init(dev):
 
 def test_ap_wpa2_tdls_concurrent_init2(dev):
     """Concurrent TDLS setup initiation (reverse)"""
+    start_ap_wpa2_psk(ap_ifname)
     bssid = "02:00:00:00:02:00"
     wlantest_setup()
     connect_2sta(dev)
@@ -135,6 +152,7 @@ def test_ap_wpa2_tdls_concurrent_init2(dev):
 
 def test_ap_wpa2_tdls_decline_resp(dev):
     """Decline TDLS Setup Response"""
+    start_ap_wpa2_psk(ap_ifname)
     bssid = "02:00:00:00:02:00"
     wlantest_setup()
     connect_2sta(dev)
@@ -143,6 +161,7 @@ def test_ap_wpa2_tdls_decline_resp(dev):
 
 def test_ap_wpa2_tdls_long_lifetime(dev):
     """TDLS with long TPK lifetime"""
+    start_ap_wpa2_psk(ap_ifname)
     bssid = "02:00:00:00:02:00"
     wlantest_setup()
     connect_2sta(dev)
@@ -151,6 +170,7 @@ def test_ap_wpa2_tdls_long_lifetime(dev):
 
 def test_ap_wpa2_tdls_long_frame(dev):
     """TDLS with long setup/teardown frames"""
+    start_ap_wpa2_psk(ap_ifname)
     bssid = "02:00:00:00:02:00"
     wlantest_setup()
     connect_2sta(dev)
@@ -162,6 +182,7 @@ def test_ap_wpa2_tdls_long_frame(dev):
 
 def test_ap_wpa2_tdls_reneg(dev):
     """Renegotiate TDLS link"""
+    start_ap_wpa2_psk(ap_ifname)
     bssid = "02:00:00:00:02:00"
     wlantest_setup()
     connect_2sta(dev)
@@ -170,6 +191,7 @@ def test_ap_wpa2_tdls_reneg(dev):
 
 def test_ap_wpa2_tdls_wrong_lifetime_resp(dev):
     """Incorrect TPK lifetime in TDLS Setup Response"""
+    start_ap_wpa2_psk(ap_ifname)
     bssid = "02:00:00:00:02:00"
     wlantest_setup()
     connect_2sta(dev)
@@ -178,6 +200,7 @@ def test_ap_wpa2_tdls_wrong_lifetime_resp(dev):
 
 def test_ap_wpa2_tdls_diff_rsnie(dev):
     """TDLS with different RSN IEs"""
+    start_ap_wpa2_psk(ap_ifname)
     bssid = "02:00:00:00:02:00"
     wlantest_setup()
     connect_2sta(dev)