Create DBus getter/setter for ScanInterval

Enable control of wpa_s->scan_interval via D-Bus. This parameter
controls the delay between successive scans for a suitable AP.

Also, update dbus.doxygen with ScanInterval, and some other
parameters that were undocumented.

Signed-hostap: Mukesh Agrawal <quiche@chromium.org>

wpa_supplicant/ctrl_iface.c

@@ -2581,10 +2581,7 @@ static int wpa_supplicant_ctrl_iface_scan_interval(
 	struct wpa_supplicant *wpa_s, char *cmd)
 {
 	int scan_int = atoi(cmd);
-	if (scan_int < 0)
-		return -1;
-	wpa_s->scan_interval = scan_int;
-	return 0;
+	return wpa_supplicant_set_scan_interval(wpa_s, scan_int);
 }
 
 

wpa_supplicant/dbus/dbus_new.c

@@ -2559,6 +2559,10 @@ static const struct wpa_dbus_property_desc wpas_dbus_interface_properties[] = {
 	  wpas_dbus_getter_fast_reauth,
 	  wpas_dbus_setter_fast_reauth
 	},
+	{ "ScanInterval", WPAS_DBUS_NEW_IFACE_INTERFACE, "i",
+	  wpas_dbus_getter_scan_interval,
+	  wpas_dbus_setter_scan_interval
+	},
 #ifdef CONFIG_WPS
 	{ "ProcessCredentials", WPAS_DBUS_NEW_IFACE_WPS, "b",
 	  wpas_dbus_getter_process_credentials,

wpa_supplicant/dbus/dbus_new_handlers.c

@@ -2461,6 +2461,56 @@ dbus_bool_t wpas_dbus_setter_country(DBusMessageIter *iter, DBusError *error,
 }
 
 
+/**
+ * wpas_dbus_getter_scan_interval - Get scan interval
+ * @iter: Pointer to incoming dbus message iter
+ * @error: Location to store error on failure
+ * @user_data: Function specific data
+ * Returns: TRUE on success, FALSE on failure
+ *
+ * Getter function for "ScanInterval" property.
+ */
+dbus_bool_t wpas_dbus_getter_scan_interval(DBusMessageIter *iter,
+					   DBusError *error,
+					   void *user_data)
+{
+	struct wpa_supplicant *wpa_s = user_data;
+	dbus_int32_t scan_interval = wpa_s->scan_interval;
+
+	return wpas_dbus_simple_property_getter(iter, DBUS_TYPE_INT32,
+						&scan_interval, error);
+}
+
+
+/**
+ * wpas_dbus_setter_scan_interval - Control scan interval
+ * @iter: Pointer to incoming dbus message iter
+ * @error: Location to store error on failure
+ * @user_data: Function specific data
+ * Returns: TRUE on success, FALSE on failure
+ *
+ * Setter function for "ScanInterval" property.
+ */
+dbus_bool_t wpas_dbus_setter_scan_interval(DBusMessageIter *iter,
+					   DBusError *error,
+					   void *user_data)
+{
+	struct wpa_supplicant *wpa_s = user_data;
+	dbus_int32_t scan_interval;
+
+	if (!wpas_dbus_simple_property_setter(iter, error, DBUS_TYPE_INT32,
+					      &scan_interval))
+		return FALSE;
+
+	if (wpa_supplicant_set_scan_interval(wpa_s, scan_interval)) {
+		dbus_set_error_const(error, DBUS_ERROR_FAILED,
+				     "scan_interval must be >= 0");
+		return FALSE;
+	}
+	return TRUE;
+}
+
+
 /**
  * wpas_dbus_getter_ifname - Get interface name
  * @iter: Pointer to incoming dbus message iter

wpa_supplicant/dbus/dbus_new_handlers.h

@@ -168,6 +168,14 @@ dbus_bool_t wpas_dbus_getter_country(DBusMessageIter *iter, DBusError *error,
 dbus_bool_t wpas_dbus_setter_country(DBusMessageIter *iter, DBusError *error,
 				     void *user_data);
 
+dbus_bool_t wpas_dbus_getter_scan_interval(DBusMessageIter *iter,
+					   DBusError *error,
+					   void *user_data);
+
+dbus_bool_t wpas_dbus_setter_scan_interval(DBusMessageIter *iter,
+					   DBusError *error,
+					   void *user_data);
+
 dbus_bool_t wpas_dbus_getter_ifname(DBusMessageIter *iter, DBusError *error,
 				    void *user_data);
 

wpa_supplicant/wpa_supplicant.c

@@ -1782,6 +1782,29 @@ int wpa_supplicant_set_bss_expiration_count(struct wpa_supplicant *wpa_s,
 }
 
 
+/**
+ * wpa_supplicant_set_scan_interval - Set scan interval
+ * @wpa_s: wpa_supplicant structure for a network interface
+ * @scan_interval: scan interval in seconds
+ * Returns: 0 if succeed or -1 if scan_interval has an invalid value
+ *
+ */
+int wpa_supplicant_set_scan_interval(struct wpa_supplicant *wpa_s,
+				     int scan_interval)
+{
+	if (scan_interval < 0) {
+		wpa_msg(wpa_s, MSG_ERROR, "Invalid scan interval %d",
+			scan_interval);
+		return -1;
+	}
+	wpa_msg(wpa_s, MSG_DEBUG, "Setting scan interval: %d sec",
+		scan_interval);
+	wpa_s->scan_interval = scan_interval;
+
+	return 0;
+}
+
+
 /**
  * wpa_supplicant_set_debug_params - Set global debug params
  * @global: wpa_global structure

wpa_supplicant/wpa_supplicant_i.h

@@ -588,6 +588,8 @@ int wpa_supplicant_set_bss_expiration_age(struct wpa_supplicant *wpa_s,
 					  unsigned int expire_age);
 int wpa_supplicant_set_bss_expiration_count(struct wpa_supplicant *wpa_s,
 					    unsigned int expire_count);
+int wpa_supplicant_set_scan_interval(struct wpa_supplicant *wpa_s,
+				     int scan_interval);
 int wpa_supplicant_set_debug_params(struct wpa_global *global,
 				    int debug_level, int debug_timestamp,
 				    int debug_show_keys);