tests: MBO association disallowed indication

Add a test that verifies that no Association Request frame is sent to
APs that include the MBO IE with association disallowed attribute in
Beacon and Probe Response frames.

Signed-off-by: Avraham Stern <avraham.stern@intel.com>

tests/hwsim/test_mbo.py

@@ -0,0 +1,59 @@
+# MBO tests
+# Copyright (c) 2016, Intel Deutschland GmbH
+#
+# This software may be distributed under the terms of the BSD license.
+# See README for more details.
+
+import logging
+logger = logging.getLogger()
+
+import hostapd
+import os
+
+from tshark import run_tshark
+
+def test_mbo_assoc_disallow(dev, apdev, params):
+    hapd1 = hostapd.add_ap(apdev[0]['ifname'], { "ssid": "MBO", "mbo": "1" })
+    hapd2 = hostapd.add_ap(apdev[1]['ifname'], { "ssid": "MBO", "mbo": "1" })
+
+    logger.debug("Set mbo_assoc_disallow with invalid value")
+    if "FAIL" not in hapd1.request("SET mbo_assoc_disallow 2"):
+	raise Exception("Set mbo_assoc_disallow for AP1 succeeded unexpectedly with value 2")
+
+    logger.debug("Disallow associations to AP1 and allow association to AP2")
+    if "OK" not in hapd1.request("SET mbo_assoc_disallow 1"):
+	raise Exception("Failed to set mbo_assoc_disallow for AP1")
+    if "OK" not in hapd2.request("SET mbo_assoc_disallow 0"):
+	raise Exception("Failed to set mbo_assoc_disallow for AP2")
+
+    dev[0].connect("MBO", key_mgmt="NONE", scan_freq="2412")
+
+    out = run_tshark(os.path.join(params['logdir'], "hwsim0.pcapng"),
+		     "wlan.fc.type == 0 && wlan.fc.type_subtype == 0x00",
+                     wait=False)
+    if "Destination address: " + hapd1.own_addr() in out:
+	raise Exception("Association request sent to disallowed AP")
+
+    timestamp = run_tshark(os.path.join(params['logdir'], "hwsim0.pcapng"),
+                           "wlan.fc.type_subtype == 0x00",
+                           display=['frame.time'], wait=False)
+
+    logger.debug("Allow associations to AP1 and disallow assications to AP2")
+    if "OK" not in hapd1.request("SET mbo_assoc_disallow 0"):
+	raise Exception("Failed to set mbo_assoc_disallow for AP1")
+    if "OK" not in hapd2.request("SET mbo_assoc_disallow 1"):
+	raise Exception("Failed to set mbo_assoc_disallow for AP2")
+
+    dev[0].request("DISCONNECT")
+    dev[0].wait_disconnected()
+
+    # Force new scan, so the assoc_disallowed indication is updated */
+    dev[0].request("FLUSH")
+
+    dev[0].connect("MBO", key_mgmt="NONE", scan_freq="2412")
+
+    filter = 'wlan.fc.type == 0 && wlan.fc.type_subtype == 0x00 && frame.time > "' + timestamp.rstrip() + '"'
+    out = run_tshark(os.path.join(params['logdir'], "hwsim0.pcapng"),
+                     filter, wait=False)
+    if "Destination address: " + hapd2.own_addr() in out:
+	raise Exception("Association request sent to disallowed AP 2")