D-Bus: Interworking network selection

Add the "InterworkingSelect" method to the DBus API to trigger an
Interworking scan with ANQP fetches. When a BSS that matches a
configured credential is found, the result is emitted using the signal
"InterworkingAPAdded". Completion of the full InterworkingSelect
operation is indicated with the "InterworkingSelectDone" signal.

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

tests/hwsim/test_dbus.py

@@ -6136,3 +6136,69 @@ def test_dbus_creds(dev, apdev):
         raise Exception("Credential remove failed")
     if not "FAIL" in dev[0].get_cred(1, 'domain'):
         raise Exception("Credential remove failed")
+
+def test_dbus_interworking(dev, apdev):
+    "D-Bus interworking selection"
+    (bus, wpas_obj, path, if_obj) = prepare_dbus(dev[0])
+    iface = dbus.Interface(if_obj, WPAS_DBUS_IFACE)
+
+    params = {"ssid": "test-interworking", "wpa": "2",
+              "wpa_key_mgmt": "WPA-EAP", "rsn_pairwise": "CCMP",
+              "ieee8021x": "1", "eapol_version": "2",
+              "eap_server": "1", "eap_user_file": "auth_serv/eap_user.conf",
+              "ca_cert": "auth_serv/ca.pem",
+              "server_cert": "auth_serv/server.pem",
+              "private_key": "auth_serv/server.key",
+              "interworking": "1",
+              "domain_name": "server.w1.fi",
+              "nai_realm": "0,server.w1.fi,21[2:4][5:7]",
+              "roaming_consortium": "2233445566",
+              "hs20": "1", "anqp_domain_id": "1234"}
+
+    hapd = hostapd.add_ap(apdev[0], params)
+
+    class TestDbusInterworking(TestDbus):
+        def __init__(self, bus):
+            TestDbus.__init__(self, bus)
+            self.interworking_ap_seen = False
+            self.interworking_select_done = False
+
+        def __enter__(self):
+            gobject.timeout_add(1, self.run_select)
+            gobject.timeout_add(15000, self.timeout)
+            self.add_signal(self.interworkingAPAdded, WPAS_DBUS_IFACE,
+                            "InterworkingAPAdded")
+            self.add_signal(self.interworkingSelectDone, WPAS_DBUS_IFACE,
+                            "InterworkingSelectDone")
+            self.loop.run()
+            return self
+
+        def interworkingAPAdded(self, bss, cred, properties):
+            logger.debug("interworkingAPAdded: bss=%s cred=%s %s" % (bss, cred, str(properties)))
+            if self.cred == cred:
+                self.interworking_ap_seen = True
+
+        def interworkingSelectDone(self):
+            logger.debug("interworkingSelectDone")
+            self.interworking_select_done = True
+            self.loop.quit()
+
+        def run_select(self, *args):
+            args = {"domain": "server.w1.fi",
+                    "realm": "server.w1.fi",
+                    "eap": "TTLS",
+                    "phase2": "auth=MSCHAPV2",
+                    "username": "user",
+                    "password": "password",
+                    "domain_suffix_match": "server.w1.fi",
+                    "ca_cert": "auth_serv/ca.pem"}
+            self.cred = iface.AddCred(dbus.Dictionary(args, signature='sv'))
+            iface.InterworkingSelect()
+            return False
+
+        def success(self):
+            return self.interworking_ap_seen and self.interworking_select_done
+
+    with TestDbusInterworking(bus) as t:
+        if not t.success():
+            raise Exception("Expected signals not seen")