D-Bus: Emit signal when a station is authorized or deauthorized

Add "StaAuthorized" and "StaDeauthorized" D-Bus interface in AP mode.
After enabling the AP mode of wpa_supplicant, the other process need to
get the MAC address and authorization status of every station, so
wpa_supplicant emits signal when the station is authorized or
deauthorized.

Signed-hostap: Chengyi Zhao <chengyix.zhao@gmail.com>

doc/dbus.doxygen

@@ -532,6 +532,26 @@ fi.w1.wpa_supplicant1.CreateInterface.
 	</dl>
       </li>
 
+      <li>
+	<h3>StaAuthorized ( s : mac )</h3>
+	<p>A new station has been authorized to the interface.</p>
+	<h4>Arguments</h4>
+	<dl>
+	  <dt>s : mac</dt>
+	  <dd>A mac address which has been authorized.</dd>
+	</dl>
+      </li>
+
+      <li>
+	<h3>StaDeauthorized ( s : mac )</h3>
+	<p>A station has been deauthorized to the interface.</p>
+	<h4>Arguments</h4>
+	<dl>
+	  <dt>s : mac</dt>
+	  <dd>A mac address which has been deauthorized.</dd>
+	</dl>
+      </li>
+
       <li>
 	<h3>PropertiesChanged ( a{sv} : properties )</h3>
 	<p>Some properties have changed.</p>

wpa_supplicant/dbus/dbus_new.c

@@ -869,6 +869,76 @@ nomem:
 }
 
 
+/**
+ * wpas_dbus_signal_sta - Send a station related event signal
+ * @wpa_s: %wpa_supplicant network interface data
+ * @sta: station mac address
+ * @sig_name: signal name - StaAuthorized or StaDeauthorized
+ *
+ * Notify listeners about event related with station
+ */
+static void wpas_dbus_signal_sta(struct wpa_supplicant *wpa_s,
+				 const u8 *sta, const char *sig_name)
+{
+	struct wpas_dbus_priv *iface;
+	DBusMessage *msg;
+	char sta_mac[WPAS_DBUS_OBJECT_PATH_MAX];
+	char *dev_mac;
+
+	os_snprintf(sta_mac, WPAS_DBUS_OBJECT_PATH_MAX, MACSTR, MAC2STR(sta));
+	dev_mac = sta_mac;
+
+	iface = wpa_s->global->dbus;
+
+	/* Do nothing if the control interface is not turned on */
+	if (iface == NULL)
+		return;
+
+	msg = dbus_message_new_signal(wpa_s->dbus_new_path,
+				      WPAS_DBUS_NEW_IFACE_INTERFACE, sig_name);
+	if (msg == NULL)
+		return;
+
+	if (dbus_message_append_args(msg, DBUS_TYPE_STRING, &dev_mac,
+				     DBUS_TYPE_INVALID))
+		dbus_connection_send(iface->con, msg, NULL);
+	else
+		wpa_printf(MSG_ERROR, "dbus: Failed to construct signal");
+	dbus_message_unref(msg);
+
+	wpa_printf(MSG_DEBUG, "dbus: Station MAC address '%s' '%s'",
+		   sta_mac, sig_name);
+}
+
+
+/**
+ * wpas_dbus_signal_sta_authorized - Send a STA authorized signal
+ * @wpa_s: %wpa_supplicant network interface data
+ * @sta: station mac address
+ *
+ * Notify listeners a new station has been authorized
+ */
+void wpas_dbus_signal_sta_authorized(struct wpa_supplicant *wpa_s,
+				     const u8 *sta)
+{
+	wpas_dbus_signal_sta(wpa_s, sta, "StaAuthorized");
+}
+
+
+/**
+ * wpas_dbus_signal_sta_deauthorized - Send a STA deauthorized signal
+ * @wpa_s: %wpa_supplicant network interface data
+ * @sta: station mac address
+ *
+ * Notify listeners a station has been deauthorized
+ */
+void wpas_dbus_signal_sta_deauthorized(struct wpa_supplicant *wpa_s,
+				       const u8 *sta)
+{
+	wpas_dbus_signal_sta(wpa_s, sta, "StaDeauthorized");
+}
+
+
 #ifdef CONFIG_P2P
 
 /**
@@ -3017,6 +3087,18 @@ static const struct wpa_dbus_signal_desc wpas_dbus_interface_signals[] = {
 		  END_ARGS
 	  }
 	},
+	{ "StaAuthorized", WPAS_DBUS_NEW_IFACE_INTERFACE,
+	  {
+		  { "name", "s", ARG_OUT },
+		  END_ARGS
+	  }
+	},
+	{ "StaDeauthorized", WPAS_DBUS_NEW_IFACE_INTERFACE,
+	  {
+		  { "name", "s", ARG_OUT },
+		  END_ARGS
+	  }
+	},
 	{ NULL, NULL, { END_ARGS } }
 };
 

wpa_supplicant/dbus/dbus_new.h

@@ -222,6 +222,10 @@ void wpas_dbus_signal_preq(struct wpa_supplicant *wpa_s,
 			   const u8 *ie, size_t ie_len, u32 ssi_signal);
 void wpas_dbus_signal_eap_status(struct wpa_supplicant *wpa_s,
 				 const char *status, const char *parameter);
+void wpas_dbus_signal_sta_authorized(struct wpa_supplicant *wpa_s,
+				     const u8 *sta);
+void wpas_dbus_signal_sta_deauthorized(struct wpa_supplicant *wpa_s,
+				       const u8 *sta);
 
 #else /* CONFIG_CTRL_IFACE_DBUS_NEW */
 
@@ -493,6 +497,18 @@ static inline void wpas_dbus_signal_eap_status(struct wpa_supplicant *wpa_s,
 {
 }
 
+static inline
+void wpas_dbus_signal_sta_authorized(struct wpa_supplicant *wpa_s,
+				     const u8 *sta)
+{
+}
+
+static inline
+void wpas_dbus_signal_sta_deauthorized(struct wpa_supplicant *wpa_s,
+				       const u8 *sta)
+{
+}
+
 #endif /* CONFIG_CTRL_IFACE_DBUS_NEW */
 
 #endif /* CTRL_IFACE_DBUS_H_NEW */

wpa_supplicant/notify.c

@@ -547,6 +547,9 @@ static void wpas_notify_ap_sta_authorized(struct wpa_supplicant *wpa_s,
 	 */
 	wpas_dbus_signal_p2p_peer_joined(wpa_s, sta);
 #endif /* CONFIG_P2P */
+
+	/* Notify listeners a new station has been authorized */
+	wpas_dbus_signal_sta_authorized(wpa_s, sta);
 }
 
 
@@ -566,6 +569,9 @@ static void wpas_notify_ap_sta_deauthorized(struct wpa_supplicant *wpa_s,
 	 */
 	wpas_dbus_signal_p2p_peer_disconnected(wpa_s, sta);
 #endif /* CONFIG_P2P */
+
+	/* Notify listeners a station has been deauthorized */
+	wpas_dbus_signal_sta_deauthorized(wpa_s, sta);
 }