dbus: Add RemoveAllNetworks to the new D-Bus API

This adds a new command to the interface to remove all configured
netblocks. Without this it's necessary to query properties on the
interface and explicitly remove each netblock.

wpa_supplicant/config.c

@@ -1730,6 +1730,31 @@ void wpa_config_free(struct wpa_config *config)
 }
 
 
+/**
+ * wpa_config_foreach_network - Iterate over each configured network
+ * @config: Configuration data from wpa_config_read()
+ * @func: Callback function to process each network
+ * @arg: Opaque argument to pass to callback function
+ *
+ * Iterate over the set of configured networks calling the specified
+ * function for each item. We guard against callbacks removing the
+ * supplied network.
+ */
+void wpa_config_foreach_network(struct wpa_config *config,
+				void (*func)(void *, struct wpa_ssid *),
+				void *arg)
+{
+	struct wpa_ssid *ssid, *next;
+
+	ssid = config->ssid;
+	while (ssid) {
+		next = ssid->next;
+		func(arg, ssid);
+		ssid = next;
+	}
+}
+
+
 /**
  * wpa_config_get_network - Get configured network based on id
  * @config: Configuration data from wpa_config_read()

wpa_supplicant/config.h

@@ -410,6 +410,9 @@ struct wpa_config {
 
 void wpa_config_free(struct wpa_config *ssid);
 void wpa_config_free_ssid(struct wpa_ssid *ssid);
+void wpa_config_foreach_network(struct wpa_config *config,
+				void (*func)(void *, struct wpa_ssid *),
+				void *arg);
 struct wpa_ssid * wpa_config_get_network(struct wpa_config *config, int id);
 struct wpa_ssid * wpa_config_add_network(struct wpa_config *config);
 int wpa_config_remove_network(struct wpa_config *config, int id);

wpa_supplicant/dbus/dbus_new.c

@@ -1312,6 +1312,12 @@ static const struct wpa_dbus_method_desc wpas_dbus_interface_methods[] = {
 		  END_ARGS
 	  }
 	},
+	{ "RemoveAllNetworks", WPAS_DBUS_NEW_IFACE_INTERFACE,
+	  (WPADBusMethodHandler) &wpas_dbus_handler_remove_all_networks,
+	  {
+		  END_ARGS
+	  }
+	},
 	{ "SelectNetwork", WPAS_DBUS_NEW_IFACE_INTERFACE,
 	  (WPADBusMethodHandler) &wpas_dbus_handler_select_network,
 	  {

wpa_supplicant/dbus/dbus_new_handlers.c

@@ -1470,6 +1470,42 @@ out:
 }
 
 
+static void remove_network(void *arg, struct wpa_ssid *ssid)
+{
+	struct wpa_supplicant *wpa_s = arg;
+
+	wpas_notify_network_removed(wpa_s, ssid);
+
+	if (wpa_config_remove_network(wpa_s->conf, ssid->id) < 0) {
+		wpa_printf(MSG_ERROR,
+			   "wpas_dbus_handler_remove_all_networks[dbus]: "
+			   "error occurred when removing network %d",
+			   ssid->id);
+		return;
+	}
+
+	if (ssid == wpa_s->current_ssid)
+		wpa_supplicant_disassociate(wpa_s, WLAN_REASON_DEAUTH_LEAVING);
+}
+
+
+/**
+ * wpas_dbus_handler_remove_all_networks - Remove all configured networks
+ * @message: Pointer to incoming dbus message
+ * @wpa_s: wpa_supplicant structure for a network interface
+ * Returns: NULL on success or dbus error on failure
+ *
+ * Handler function for "RemoveAllNetworks" method call of a network interface.
+ */
+DBusMessage * wpas_dbus_handler_remove_all_networks(
+	DBusMessage *message, struct wpa_supplicant *wpa_s)
+{
+	/* NB: could check for failure and return an error */
+	wpa_config_foreach_network(wpa_s->conf, remove_network, wpa_s);
+	return NULL;
+}
+
+
 /**
  * wpas_dbus_handler_select_network - Attempt association with a network
  * @message: Pointer to incoming dbus message

wpa_supplicant/dbus/dbus_new_handlers.h

@@ -83,6 +83,9 @@ DBusMessage * wpas_dbus_handler_add_network(DBusMessage *message,
 DBusMessage * wpas_dbus_handler_remove_network(DBusMessage *message,
 					       struct wpa_supplicant *wpa_s);
 
+DBusMessage * wpas_dbus_handler_remove_all_networks(
+	DBusMessage *message, struct wpa_supplicant *wpa_s);
+
 DBusMessage * wpas_dbus_handler_select_network(DBusMessage *message,
 					       struct wpa_supplicant *wpa_s);