dbus: Define priv argument for object rather than for method

We don't actually need to define separate user_data argument for
each method handler and property getter/setter. Instead, we can define
one argument for the whole object. That will make it easier to register
objects like BSS or Networks which require allocating and freeing
memory for their arguments.

wpa_supplicant/dbus/dbus_new.c

@@ -942,16 +942,20 @@ struct wpas_dbus_signal {
 
 static void wpas_dbus_register(struct wpa_dbus_object_desc *obj_desc,
 			       void *priv,
+			       WPADBusArgumentFreeFunction priv_free,
 			       const struct wpas_dbus_method *methods,
 			       const struct wpas_dbus_property *properties,
 			       const struct wpas_dbus_signal *signals)
 {
 	int i;
 
+	obj_desc->user_data = priv;
+	obj_desc->user_data_free_func = priv_free;
+
 	for (i = 0; methods && methods[i].name; i++) {
 		wpa_dbus_method_register(obj_desc, methods[i].iface,
 					 methods[i].name, methods[i].handler,
-					 priv, NULL, methods[i].args);
+					 methods[i].args);
 	}
 
 	for (i = 0; properties && properties[i].name; i++) {
@@ -960,7 +964,7 @@ static void wpas_dbus_register(struct wpa_dbus_object_desc *obj_desc,
 					   properties[i].type,
 					   properties[i].getter,
 					   properties[i].setter,
-					   priv, NULL, properties[i]._access);
+					   properties[i]._access);
 	}
 
 	for (i = 0; signals && signals[i].name; i++) {
@@ -1059,7 +1063,8 @@ int wpas_dbus_ctrl_iface_init(struct wpas_dbus_priv *priv)
 		return -1;
 	}
 
-	wpas_dbus_register(obj_desc, priv->global, wpas_dbus_global_methods,
+	wpas_dbus_register(obj_desc, priv->global, NULL,
+			   wpas_dbus_global_methods,
 			   wpas_dbus_global_properties,
 			   wpas_dbus_global_signals);
 
@@ -1102,6 +1107,32 @@ static void wpa_dbus_free(void *ptr)
 }
 
 
+static const struct wpas_dbus_property wpas_dbus_network_properties[] = {
+	{ "Properties", WPAS_DBUS_NEW_IFACE_NETWORK, "a{sv}",
+	  (WPADBusPropertyAccessor) wpas_dbus_getter_network_properties,
+	  (WPADBusPropertyAccessor) wpas_dbus_setter_network_properties,
+	  RW
+	},
+	{ "Enabled", WPAS_DBUS_NEW_IFACE_NETWORK, "b",
+	  (WPADBusPropertyAccessor) wpas_dbus_getter_enabled,
+	  (WPADBusPropertyAccessor) wpas_dbus_setter_enabled,
+	  RW
+	},
+	{ NULL, NULL, NULL, NULL, NULL, 0 }
+};
+
+
+static const struct wpas_dbus_signal wpas_dbus_network_signals[] = {
+	{ "PropertiesChanged", WPAS_DBUS_NEW_IFACE_NETWORK,
+	  {
+		  { "properties", "a{sv}", ARG_OUT },
+		  END_ARGS
+	  }
+	},
+	{ NULL, NULL, { END_ARGS } }
+};
+
+
 /**
  * wpas_dbus_register_network - Register a configured network with dbus
  * @wpa_s: wpa_supplicant interface structure
@@ -1116,16 +1147,10 @@ static int wpas_dbus_register_network(struct wpa_supplicant *wpa_s,
 	struct wpas_dbus_priv *ctrl_iface;
 	struct wpa_dbus_object_desc *obj_desc;
 
-	struct network_handler_args *arg1 = NULL;
-	struct network_handler_args *arg2 = NULL;
+	struct network_handler_args *arg = NULL;
 
 	char *net_obj_path;
 
-	struct wpa_dbus_argument sargs[] = {
-		{ "properties", "a{sv}", ARG_OUT },
-		END_ARGS
-	};
-
 	/* Do nothing if the control interface is not turned on */
 	if (wpa_s == NULL || wpa_s->global == NULL)
 		return 0;
@@ -1150,45 +1175,19 @@ static int wpas_dbus_register_network(struct wpa_supplicant *wpa_s,
 	}
 
 	/* allocate memory for handlers arguments */
-	arg1 =	os_zalloc(sizeof(struct network_handler_args));
-	if (!arg1) {
-		wpa_printf(MSG_ERROR, "Not enough memory "
-			   "to create arguments for method");
-		goto err;
-	}
-	arg2 =	os_zalloc(sizeof(struct network_handler_args));
-	if (!arg2) {
+	arg = os_zalloc(sizeof(struct network_handler_args));
+	if (!arg) {
 		wpa_printf(MSG_ERROR, "Not enough memory "
 			   "to create arguments for method");
 		goto err;
 	}
 
-	arg1->wpa_s = wpa_s;
-	arg1->ssid = ssid;
-	arg2->wpa_s = wpa_s;
-	arg2->ssid = ssid;
-
-	/* Enabled property */
-	wpa_dbus_property_register(obj_desc, WPAS_DBUS_NEW_IFACE_NETWORK,
-				   "Enabled", "b",
-				   (WPADBusPropertyAccessor)
-				   wpas_dbus_getter_enabled,
-				   (WPADBusPropertyAccessor)
-				   wpas_dbus_setter_enabled,
-				   arg1, wpa_dbus_free, RW);
-
-	/* Properties property */
-	wpa_dbus_property_register(obj_desc, WPAS_DBUS_NEW_IFACE_NETWORK,
-				   "Properties", "a{sv}",
-				   (WPADBusPropertyAccessor)
-				   wpas_dbus_getter_network_properties,
-				   (WPADBusPropertyAccessor)
-				   wpas_dbus_setter_network_properties,
-				   arg2, wpa_dbus_free, RW);
-
-	/* PropertiesChanged signal */
-	wpa_dbus_signal_register(obj_desc, WPAS_DBUS_NEW_IFACE_NETWORK,
-				 "PropertiesChanged", sargs);
+	arg->wpa_s = wpa_s;
+	arg->ssid = ssid;
+
+	wpas_dbus_register(obj_desc, arg, wpa_dbus_free, NULL,
+			   wpas_dbus_network_properties,
+			   wpas_dbus_network_signals);
 
 	if (wpa_dbus_register_object_per_iface(ctrl_iface, net_obj_path,
 					       wpa_s->ifname, obj_desc))
@@ -1202,8 +1201,7 @@ static int wpas_dbus_register_network(struct wpa_supplicant *wpa_s,
 err:
 	os_free(net_obj_path);
 	os_free(obj_desc);
-	os_free(arg1);
-	os_free(arg2);
+	os_free(arg);
 	return -1;
 }
 
@@ -1248,6 +1246,27 @@ static int wpas_dbus_unregister_network(struct wpa_supplicant *wpa_s, int nid)
 }
 
 
+static const struct wpas_dbus_property wpas_dbus_bss_properties[] = {
+	{ "Properties", WPAS_DBUS_NEW_IFACE_BSSID, "a{sv}",
+	  (WPADBusPropertyAccessor) wpas_dbus_getter_bss_properties,
+	  NULL,
+	  R
+	},
+	{ NULL, NULL, NULL, NULL, NULL, 0 }
+};
+
+
+static const struct wpas_dbus_signal wpas_dbus_bss_signals[] = {
+	{ "PropertiesChanged", WPAS_DBUS_NEW_IFACE_BSSID,
+	  {
+		  { "properties", "a{sv}", ARG_OUT },
+		  END_ARGS
+	  }
+	},
+	{ NULL, NULL, { END_ARGS } }
+};
+
+
 /**
  * wpas_dbus_unregister_bss - Unregister a scanned BSS from dbus
  * @wpa_s: wpa_supplicant interface structure
@@ -1344,12 +1363,9 @@ static int wpas_dbus_register_bss(struct wpa_supplicant *wpa_s,
 	arg->wpa_s = wpa_s;
 	arg->id = id;
 
-	/* Properties property */
-	wpa_dbus_property_register(obj_desc, WPAS_DBUS_NEW_IFACE_BSSID,
-				   "Properties", "a{sv}",
-				   (WPADBusPropertyAccessor)
-				   wpas_dbus_getter_bss_properties, NULL,
-				   arg, wpa_dbus_free, R);
+	wpas_dbus_register(obj_desc, arg, wpa_dbus_free, NULL,
+			   wpas_dbus_bss_properties,
+			   wpas_dbus_bss_signals);
 
 	wpa_printf(MSG_DEBUG, "dbus: Register BSS object '%s'",
 		   bss_obj_path);
@@ -1627,7 +1643,7 @@ static int wpas_dbus_register_interface(struct wpa_supplicant *wpa_s)
 		goto err;
 	}
 
-	wpas_dbus_register(obj_desc, wpa_s, wpas_dbus_interface_methods,
+	wpas_dbus_register(obj_desc, wpa_s, NULL, wpas_dbus_interface_methods,
 			   wpas_dbus_interface_properties,
 			   wpas_dbus_interface_signals);
 

wpa_supplicant/dbus/dbus_new_helpers.c

@@ -35,10 +35,6 @@ struct wpa_dbus_method_desc {
 
 	/* method handling function */
 	WPADBusMethodHandler method_handler;
-	/* handler function argument */
-	void *handler_argument;
-	/* function used to free handler argument */
-	WPADBusArgumentFreeFunction argument_free_func;
 
 	/* number of method arguments */
 	int args_num;
@@ -87,10 +83,6 @@ struct wpa_dbus_property_desc {
 	WPADBusPropertyAccessor getter;
 	/* property setter function */
 	WPADBusPropertyAccessor setter;
-	/* argument for getter and setter functions */
-	void *user_data;
-	/* function used to free accessors argument */
-	WPADBusArgumentFreeFunction user_data_free_func;
 };
 
 
@@ -629,13 +621,16 @@ static void recursive_iter_copy(DBusMessageIter *from, DBusMessageIter *to)
  */
 static DBusMessage * get_all_properties(
 	DBusMessage *message, char *interface,
-	struct wpa_dbus_property_desc *property_dsc)
+	struct wpa_dbus_object_desc *obj_dsc)
 {
 	/* Create and initialize the return message */
 	DBusMessage *reply = dbus_message_new_method_return(message);
 	DBusMessage *getterReply = NULL;
 	DBusMessageIter iter, dict_iter, entry_iter, ret_iter;
 	int counter = 0;
+	struct wpa_dbus_property_desc *property_dsc;
+
+	property_dsc = obj_dsc->properties;
 
 	dbus_message_iter_init_append(reply, &iter);
 
@@ -652,7 +647,7 @@ static DBusMessage * get_all_properties(
 		    property_dsc->access != W && property_dsc->getter) {
 
 			getterReply = property_dsc->getter(
-				message, property_dsc->user_data);
+				message, obj_dsc->user_data);
 			dbus_message_iter_init(getterReply, &ret_iter);
 
 			dbus_message_iter_open_container(&dict_iter,
@@ -719,20 +714,20 @@ static DBusMessage * properties_get_all(DBusMessage *message, char *interface,
 		return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
 					      NULL);
 
-	return get_all_properties(message, interface,
-				  obj_dsc->properties);
+	return get_all_properties(message, interface, obj_dsc);
 }
 
 
 static DBusMessage * properties_get(DBusMessage *message,
-				    struct wpa_dbus_property_desc *dsc)
+				    struct wpa_dbus_property_desc *dsc,
+				    void *user_data)
 {
 	if (os_strcmp(dbus_message_get_signature(message), "ss"))
 		return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
 					      NULL);
 
 	if (dsc->access != W && dsc->getter)
-		return dsc->getter(message, dsc->user_data);
+		return dsc->getter(message, user_data);
 
 	return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
 				      "Property is write-only");
@@ -740,14 +735,15 @@ static DBusMessage * properties_get(DBusMessage *message,
 
 
 static DBusMessage * properties_set(DBusMessage *message,
-				    struct wpa_dbus_property_desc *dsc)
+				    struct wpa_dbus_property_desc *dsc,
+				    void *user_data)
 {
 	if (os_strcmp(dbus_message_get_signature(message), "ssv"))
 		return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
 					      NULL);
 
 	if (dsc->access != R && dsc->setter)
-		return dsc->setter(message, dsc->user_data);
+		return dsc->setter(message, user_data);
 
 	return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
 				      "Property is read-only");
@@ -795,9 +791,10 @@ properties_get_or_set(DBusMessage *message, DBusMessageIter *iter,
 
 	if (os_strncmp(WPA_DBUS_PROPERTIES_GET, method,
 		       WPAS_DBUS_METHOD_SIGNAL_PROP_MAX) == 0)
-		return properties_get(message, property_dsc);
+		return properties_get(message, property_dsc,
+				      obj_dsc->user_data);
 
-	return properties_set(message, property_dsc);
+	return properties_set(message, property_dsc, obj_dsc->user_data);
 }
 
 
@@ -876,7 +873,7 @@ static DBusMessage * msg_method_handler(DBusMessage *message,
 	}
 
 	return method_dsc->method_handler(message,
-					  method_dsc->handler_argument);
+					  obj_dsc->user_data);
 }
 
 
@@ -973,10 +970,6 @@ void free_dbus_object_desc(struct wpa_dbus_object_desc *obj_dsc)
 			os_free(tmp_met_dsc->args[i].type);
 		}
 
-		if (tmp_met_dsc->argument_free_func)
-			tmp_met_dsc->argument_free_func(
-				tmp_met_dsc->handler_argument);
-
 		os_free(tmp_met_dsc);
 	}
 
@@ -1009,13 +1002,13 @@ void free_dbus_object_desc(struct wpa_dbus_object_desc *obj_dsc)
 		os_free(tmp_prop_dsc->dbus_property);
 		os_free(tmp_prop_dsc->type);
 
-		if (tmp_prop_dsc->user_data_free_func)
-			tmp_prop_dsc->user_data_free_func(
-				tmp_prop_dsc->user_data);
-
 		os_free(tmp_prop_dsc);
 	}
 
+	/* free handler's argument */
+	if (obj_dsc->user_data_free_func)
+		obj_dsc->user_data_free_func(obj_dsc->user_data);
+
 	os_free(obj_dsc);
 }
 
@@ -1159,24 +1152,19 @@ int wpa_dbus_unregister_object_per_iface(
  * @dbus_interface: DBus interface under which method will be registered
  * @dbus_method: a name the method will be registered with
  * @method_handler: a function which will be called to handle this method call
- * @handler_argument: an additional argument passed to handler function
- * @argument_free_func: function used to free handler argument
  * @args: method arguments list
  * Returns: Zero on success and -1 on failure
  *
  * Registers DBus method under given name and interface for the object.
- * Method calls will be handled with given handling function and optional
- * argument passed to this function. Handler function is required to return
- * a DBusMessage pointer which will be response to method call. Any method
- * call before being handled must have registered appropriate handler by
- * using this function.
+ * Method calls will be handled with given handling function.
+ * Handler function is required to return a DBusMessage pointer which
+ * will be response to method call. Any method call before being handled
+ * must have registered appropriate handler by using this function.
  */
 int wpa_dbus_method_register(struct wpa_dbus_object_desc *obj_dsc,
 			     const char *dbus_interface,
 			     const char *dbus_method,
 			     WPADBusMethodHandler method_handler,
-			     void *handler_argument,
-			     WPADBusArgumentFreeFunction argument_free_func,
 			     const struct wpa_dbus_argument args[])
 {
 	struct wpa_dbus_method_desc *method_dsc = obj_dsc->methods;
@@ -1246,8 +1234,6 @@ int wpa_dbus_method_register(struct wpa_dbus_object_desc *obj_dsc,
 		goto err;
 
 	method_dsc->method_handler = method_handler;
-	method_dsc->handler_argument = handler_argument;
-	method_dsc->argument_free_func = argument_free_func;
 	method_dsc->next = NULL;
 
 	return 0;
@@ -1393,17 +1379,14 @@ err:
  * @type: a property type signature in form of DBus type description
  * @getter: a function called in order to get property value
  * @setter: a function called in order to set property value
- * @user_data: additional argument passed to setter or getter
- * @user_data_free_func: function used to free additional argument
  * @access: property access permissions specifier (R, W or RW)
  * Returns: Zero on success and -1 on failure
  *
  * Registers DBus property under given name and interface for the object.
- * Property are set with giver setter function and get with getter.
- * Additional argument is passed to getter or setter. Getter or setter
- * are required to return DBusMessage which is response to Set/Get method
- * calls. Every property must be registered by this function before being
- * used.
+ * Properties are set with giver setter function and get with getter.Getter
+ * or setter are required to return DBusMessage which is response to Set/Get
+ * method calls. Every property must be registered by this function before
+ * being used.
  */
 int wpa_dbus_property_register(struct wpa_dbus_object_desc *obj_dsc,
 			       const char *dbus_interface,
@@ -1411,8 +1394,6 @@ int wpa_dbus_property_register(struct wpa_dbus_object_desc *obj_dsc,
 			       const char *type,
 			       WPADBusPropertyAccessor getter,
 			       WPADBusPropertyAccessor setter,
-			       void *user_data,
-			       WPADBusArgumentFreeFunction user_data_free_func,
 			       enum dbus_prop_access _access)
 {
 	struct wpa_dbus_property_desc *property_dsc = obj_dsc->properties;
@@ -1458,8 +1439,6 @@ int wpa_dbus_property_register(struct wpa_dbus_object_desc *obj_dsc,
 
 	property_dsc->getter = getter;
 	property_dsc->setter = setter;
-	property_dsc->user_data = user_data;
-	property_dsc->user_data_free_func = user_data_free_func;
 	property_dsc->access = _access;
 	property_dsc->next = NULL;
 

wpa_supplicant/dbus/dbus_new_helpers.h

@@ -27,9 +27,17 @@ typedef DBusMessage * (* WPADBusPropertyAccessor)(DBusMessage *message,
 
 struct wpa_dbus_object_desc {
 	DBusConnection *connection;
+
+	/* list of methods, properties and signals registered with object */
 	struct wpa_dbus_method_desc *methods;
 	struct wpa_dbus_signal_desc *signals;
 	struct wpa_dbus_property_desc *properties;
+
+	/* argument for method handlers and properties
+	 * getter and setter functions */
+	void *user_data;
+	/* function used to free above argument */
+	WPADBusArgumentFreeFunction user_data_free_func;
 };
 
 enum dbus_prop_access { R, W, RW };
@@ -86,8 +94,6 @@ int wpa_dbus_method_register(struct wpa_dbus_object_desc *obj_dsc,
 			     const char *dbus_interface,
 			     const char *dbus_method,
 			     WPADBusMethodHandler method_handler,
-			     void *handler_argument,
-			     WPADBusArgumentFreeFunction argument_free_func,
 			     const struct wpa_dbus_argument args[]);
 
 int wpa_dbus_signal_register(struct wpa_dbus_object_desc *obj_dsc,
@@ -101,8 +107,6 @@ int wpa_dbus_property_register(
 	const char *type,
 	WPADBusPropertyAccessor getter,
 	WPADBusPropertyAccessor setter,
-	void *user_data,
-	WPADBusArgumentFreeFunction user_data_free_func,
 	enum dbus_prop_access _access);
 
 void wpa_dbus_signal_property_changed(struct wpas_dbus_priv *iface,