DBus: Add a method to get ANQP fields

Add a D-Bus method to perform ANQP get requests. The new method is
equivalent to the "anqp_get" command available in wpa_cli.

Signed-off-by: Damien Dejean <damiendejean@chromium.org>

tests/hwsim/test_dbus.py

@@ -12,6 +12,7 @@ import time
 import shutil
 import struct
 import sys
+from test_ap_hs20 import hs20_ap_params
 
 try:
     if sys.version_info[0] > 2:
@@ -6267,3 +6268,43 @@ def test_dbus_hs20_terms_and_conditions(dev, apdev):
     with TestDbusInterworking(bus) as t:
         if not t.success():
             raise Exception("Expected signals not seen")
+
+def test_dbus_anqp_get(dev, apdev):
+    """D-Bus ANQP get test"""
+    (bus, wpa_obj, path, if_obj) = prepare_dbus(dev[0])
+    iface = dbus.Interface(if_obj, WPAS_DBUS_IFACE)
+
+    bssid = apdev[0]['bssid']
+    params = hs20_ap_params(ssid="test-anqp")
+    params["hessid"] = bssid
+    params['mbo'] = '1'
+    params['mbo_cell_data_conn_pref'] = '1'
+    params['hs20_oper_friendly_name'] = ["eng:Example operator",
+                                         "fin:Esimerkkioperaattori"]
+    hapd = hostapd.add_ap(apdev[0], params)
+
+    dev[0].scan_for_bss(bssid, freq="2412", force_scan=True)
+    iface.ANQPGet({"addr": bssid,
+                   "ids": dbus.Array([257], dbus.Signature("q")),
+                   "mbo_ids": dbus.Array([2], dbus.Signature("y")),
+                   "hs20_ids": dbus.Array([3, 4], dbus.Signature("y"))})
+
+    ev = dev[0].wait_event(["GAS-QUERY-DONE"], timeout=10)
+    if ev is None:
+        raise Exception("GAS query timed out")
+
+    ev = dev[0].wait_event(["RX-ANQP"], timeout=1)
+    if ev is None or "ANQP Capability list" not in ev:
+        raise Exception("Did not receive Capability list")
+
+    ev = dev[0].wait_event(["RX-HS20-ANQP"], timeout=1)
+    if ev is None or "Operator Friendly Name" not in ev:
+        raise Exception("Did not receive Operator Friendly Name")
+
+    ev = dev[0].wait_event(["RX-MBO-ANQP"], timeout=1)
+    if ev is None or "cell_conn_pref" not in ev:
+        raise Exception("Did not receive MBO Cellular Data Connection Preference")
+
+    bss = dev[0].get_bss(bssid)
+    if 'anqp_capability_list' not in bss:
+        raise Exception("Capability List ANQP-element not seen")