tests: Add test cases for AP channel switch announcement

Signed-hostap: Luciano Coelho <luciano.coelho@intel.com>

Skip CSA tests if the driver doesn't support this in AP mode.

Signed-hostap: Andrei Otcheretianski <andrei.otcheretianski@intel.com>

tests/hwsim/test_ap_csa.py

@@ -0,0 +1,116 @@
+# AP CSA tests
+# Copyright (c) 2013, Luciano Coelho <luciano.coelho@intel.com>
+#
+# This software may be distributed under the terms of the BSD license.
+# See README for more details.
+
+import time
+import logging
+logger = logging.getLogger()
+
+import hwsim_utils
+import hostapd
+
+def connect(dev, apdev):
+    params = { "ssid": "ap-csa",
+               "channel": "1" }
+    ap = hostapd.add_ap(apdev[0]['ifname'], params)
+    dev.connect("ap-csa", key_mgmt="NONE")
+    return ap
+
+def switch_channel(ap, count, freq):
+    ap.request("CHAN_SWITCH " + str(count) + " " + str(freq))
+    ev = ap.wait_event(["AP-CSA-FINISHED"], timeout=10)
+    if ev is None:
+        raise Exception("CSA finished event timed out")
+    if "freq=" + str(freq) not in ev:
+        raise Exception("Unexpected channel in CSA finished event")
+    time.sleep(0.1)
+
+# This function checks whether the provided dev, which may be either
+# WpaSupplicant or Hostapd supports CSA.
+def csa_supported(dev):
+    res = dev.get_driver_status()
+    return (int(res['capa.flags'], 0) & 0x80000000) != 0
+
+def test_ap_csa_1_switch(dev, apdev):
+    """AP Channel Switch, one switch"""
+    if not csa_supported(dev[0]):
+        return "skip"
+    ap = connect(dev[0], apdev)
+
+    hwsim_utils.test_connectivity(dev[0].ifname, apdev[0]['ifname'])
+    switch_channel(ap, 10, 2462)
+    hwsim_utils.test_connectivity(dev[0].ifname, apdev[0]['ifname'])
+
+def test_ap_csa_2_switches(dev, apdev):
+    """AP Channel Switch, two switches"""
+    if not csa_supported(dev[0]):
+        return "skip"
+    ap = connect(dev[0], apdev)
+
+    hwsim_utils.test_connectivity(dev[0].ifname, apdev[0]['ifname'])
+    switch_channel(ap, 10, 2462)
+    hwsim_utils.test_connectivity(dev[0].ifname, apdev[0]['ifname'])
+    switch_channel(ap, 10, 2412)
+    hwsim_utils.test_connectivity(dev[0].ifname, apdev[0]['ifname'])
+
+def test_ap_csa_1_switch_count_0(dev, apdev):
+    """AP Channel Switch, one switch with count 0"""
+    if not csa_supported(dev[0]):
+        return "skip"
+    ap = connect(dev[0], apdev)
+
+    hwsim_utils.test_connectivity(dev[0].ifname, apdev[0]['ifname'])
+    switch_channel(ap, 0, 2462)
+    # this does not result in CSA currently, so do not bother checking
+    # connectivity
+
+def test_ap_csa_2_switches_count_0(dev, apdev):
+    """AP Channel Switch, two switches with count 0"""
+    if not csa_supported(dev[0]):
+        return "skip"
+    ap = connect(dev[0], apdev)
+
+    hwsim_utils.test_connectivity(dev[0].ifname, apdev[0]['ifname'])
+    switch_channel(ap, 0, 2462)
+    # this does not result in CSA currently, so do not bother checking
+    # connectivity
+    switch_channel(ap, 0, 2412)
+    # this does not result in CSA currently, so do not bother checking
+    # connectivity
+
+def test_ap_csa_1_switch_count_1(dev, apdev):
+    """AP Channel Switch, one switch with count 1"""
+    if not csa_supported(dev[0]):
+        return "skip"
+    ap = connect(dev[0], apdev)
+
+    hwsim_utils.test_connectivity(dev[0].ifname, apdev[0]['ifname'])
+    switch_channel(ap, 1, 2462)
+    # this does not result in CSA currently, so do not bother checking
+    # connectivity
+
+def test_ap_csa_2_switches_count_1(dev, apdev):
+    """AP Channel Switch, two switches with count 1"""
+    if not csa_supported(dev[0]):
+        return "skip"
+    ap = connect(dev[0], apdev)
+
+    hwsim_utils.test_connectivity(dev[0].ifname, apdev[0]['ifname'])
+    switch_channel(ap, 1, 2462)
+    # this does not result in CSA currently, so do not bother checking
+    # connectivity
+    switch_channel(ap, 1, 2412)
+    # this does not result in CSA currently, so do not bother checking
+    # connectivity
+
+def test_ap_csa_1_switch_count_2(dev, apdev):
+    """AP Channel Switch, one switch with count 2"""
+    if not csa_supported(dev[0]):
+        return "skip"
+    ap = connect(dev[0], apdev)
+
+    hwsim_utils.test_connectivity(dev[0].ifname, apdev[0]['ifname'])
+    switch_channel(ap, 2, 2462)
+    hwsim_utils.test_connectivity(dev[0].ifname, apdev[0]['ifname'])