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D-Bus: Use a helper function to get possibly NULL strings

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This type of check is used in quite a few getter functions, so add a
helper function to take care of it.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2016-12-23 11:22:00 +02:00
parent dbf524946b
commit 77fcbf7ff1
4 changed files with 52 additions and 68 deletions
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63
wpa_supplicant/dbus/dbus_new_handlers.c
View file

@ -516,6 +516,27 @@ dbus_bool_t wpas_dbus_simple_array_array_property_getter(DBusMessageIter *iter,
}
/**
* wpas_dbus_string_property_getter - Get string type property
* @iter: Message iter to use when appending arguments
* @val: Pointer to place holding property value, can be %NULL
* @error: On failure an error describing the failure
* Returns: TRUE if the request was successful, FALSE if it failed
*
* Generic getter for string type properties. %NULL is converted to an empty
* string.
*/
dbus_bool_t wpas_dbus_string_property_getter(DBusMessageIter *iter,
const void *val,
DBusError *error)
{
if (!val)
val = "";
return wpas_dbus_simple_property_getter(iter, DBUS_TYPE_STRING,
&val, error);
}
/**
* wpas_dbus_handler_create_interface - Request registration of a network iface
* @message: Pointer to incoming dbus message
@ -3086,10 +3107,8 @@ dbus_bool_t wpas_dbus_getter_ifname(
DBusMessageIter *iter, DBusError *error, void *user_data)
{
struct wpa_supplicant *wpa_s = user_data;
const char *ifname = wpa_s->ifname;
return wpas_dbus_simple_property_getter(iter, DBUS_TYPE_STRING,
&ifname, error);
return wpas_dbus_string_property_getter(iter, wpa_s->ifname, error);
}
@ -3107,7 +3126,6 @@ dbus_bool_t wpas_dbus_getter_driver(
DBusMessageIter *iter, DBusError *error, void *user_data)
{
struct wpa_supplicant *wpa_s = user_data;
const char *driver;
if (wpa_s->driver == NULL || wpa_s->driver->name == NULL) {
wpa_printf(MSG_DEBUG, "%s[dbus]: wpa_s has no driver set",
@ -3117,9 +3135,8 @@ dbus_bool_t wpas_dbus_getter_driver(
return FALSE;
}
driver = wpa_s->driver->name;
return wpas_dbus_simple_property_getter(iter, DBUS_TYPE_STRING,
&driver, error);
return wpas_dbus_string_property_getter(iter, wpa_s->driver->name,
error);
}
@ -3232,10 +3249,9 @@ dbus_bool_t wpas_dbus_getter_bridge_ifname(
DBusMessageIter *iter, DBusError *error, void *user_data)
{
struct wpa_supplicant *wpa_s = user_data;
const char *bridge_ifname = wpa_s->bridge_ifname;
return wpas_dbus_simple_property_getter(iter, DBUS_TYPE_STRING,
&bridge_ifname, error);
return wpas_dbus_string_property_getter(iter, wpa_s->bridge_ifname,
error);
}
@ -3253,13 +3269,8 @@ dbus_bool_t wpas_dbus_getter_config_file(
DBusMessageIter *iter, DBusError *error, void *user_data)
{
struct wpa_supplicant *wpa_s = user_data;
char *confname = "";
if (wpa_s->confname)
confname = wpa_s->confname;
return wpas_dbus_simple_property_getter(iter, DBUS_TYPE_STRING,
&confname, error);
return wpas_dbus_string_property_getter(iter, wpa_s->confname, error);
}
@ -3399,14 +3410,10 @@ dbus_bool_t wpas_dbus_getter_pkcs11_engine_path(
DBusMessageIter *iter, DBusError *error, void *user_data)
{
struct wpa_supplicant *wpa_s = user_data;
const char *pkcs11_engine_path;
if (wpa_s->conf->pkcs11_engine_path == NULL)
pkcs11_engine_path = "";
else
pkcs11_engine_path = wpa_s->conf->pkcs11_engine_path;
return wpas_dbus_simple_property_getter(iter, DBUS_TYPE_STRING,
&pkcs11_engine_path, error);
return wpas_dbus_string_property_getter(iter,
wpa_s->conf->pkcs11_engine_path,
error);
}
@ -3424,14 +3431,10 @@ dbus_bool_t wpas_dbus_getter_pkcs11_module_path(
DBusMessageIter *iter, DBusError *error, void *user_data)
{
struct wpa_supplicant *wpa_s = user_data;
const char *pkcs11_module_path;
if (wpa_s->conf->pkcs11_module_path == NULL)
pkcs11_module_path = "";
else
pkcs11_module_path = wpa_s->conf->pkcs11_module_path;
return wpas_dbus_simple_property_getter(iter, DBUS_TYPE_STRING,
&pkcs11_module_path, error);
return wpas_dbus_string_property_getter(iter,
wpa_s->conf->pkcs11_module_path,
error);
}

4
wpa_supplicant/dbus/dbus_new_handlers.h
View file

@ -43,6 +43,10 @@ dbus_bool_t wpas_dbus_simple_array_array_property_getter(DBusMessageIter *iter,
size_t array_len,
DBusError *error);
dbus_bool_t wpas_dbus_string_property_getter(DBusMessageIter *iter,
const void *val,
DBusError *error);
DBusMessage * wpas_dbus_handler_create_interface(DBusMessage *message,
struct wpa_global *global);

9
wpa_supplicant/dbus/dbus_new_handlers_p2p.c
View file

@ -2352,19 +2352,12 @@ dbus_bool_t wpas_dbus_getter_p2p_group_passphrase(
DBusMessageIter *iter, DBusError *error, void *user_data)
{
struct wpa_supplicant *wpa_s = user_data;
char *p_pass;
struct wpa_ssid *ssid = wpa_s->current_ssid;
if (ssid == NULL)
return FALSE;
p_pass = ssid->passphrase;
if (!p_pass)
p_pass = "";
return wpas_dbus_simple_property_getter(iter, DBUS_TYPE_STRING,
&p_pass, error);
return wpas_dbus_string_property_getter(iter, ssid->passphrase, error);
}

44
wpa_supplicant/dbus/dbus_new_handlers_wps.c
View file

@ -412,12 +412,10 @@ dbus_bool_t wpas_dbus_getter_config_methods(
DBusMessageIter *iter, DBusError *error, void *user_data)
{
struct wpa_supplicant *wpa_s = user_data;
char *methods = wpa_s->conf->config_methods;
if (methods == NULL)
methods = "";
return wpas_dbus_simple_property_getter(iter, DBUS_TYPE_STRING,
&methods, error);
return wpas_dbus_string_property_getter(iter,
wpa_s->conf->config_methods,
error);
}
@ -470,12 +468,9 @@ dbus_bool_t wpas_dbus_getter_wps_device_name(
DBusMessageIter *iter, DBusError *error, void *user_data)
{
struct wpa_supplicant *wpa_s = user_data;
char *methods = wpa_s->conf->device_name;
if (!methods)
methods = "";
return wpas_dbus_simple_property_getter(iter, DBUS_TYPE_STRING,
&methods, error);
return wpas_dbus_string_property_getter(iter, wpa_s->conf->device_name,
error);
}
@ -529,12 +524,9 @@ dbus_bool_t wpas_dbus_getter_wps_manufacturer(
DBusMessageIter *iter, DBusError *error, void *user_data)
{
struct wpa_supplicant *wpa_s = user_data;
char *manufacturer = wpa_s->conf->manufacturer;
if (!manufacturer)
manufacturer = "";
return wpas_dbus_simple_property_getter(iter, DBUS_TYPE_STRING,
&manufacturer, error);
return wpas_dbus_string_property_getter(iter, wpa_s->conf->manufacturer,
error);
}
@ -588,12 +580,9 @@ dbus_bool_t wpas_dbus_getter_wps_device_model_name(
DBusMessageIter *iter, DBusError *error, void *user_data)
{
struct wpa_supplicant *wpa_s = user_data;
char *model_name = wpa_s->conf->model_name;
if (!model_name)
model_name = "";
return wpas_dbus_simple_property_getter(iter, DBUS_TYPE_STRING,
&model_name, error);
return wpas_dbus_string_property_getter(iter, wpa_s->conf->model_name,
error);
}
@ -646,12 +635,9 @@ dbus_bool_t wpas_dbus_getter_wps_device_model_number(
DBusMessageIter *iter, DBusError *error, void *user_data)
{
struct wpa_supplicant *wpa_s = user_data;
char *model_number = wpa_s->conf->model_number;
if (!model_number)
model_number = "";
return wpas_dbus_simple_property_getter(iter, DBUS_TYPE_STRING,
&model_number, error);
return wpas_dbus_string_property_getter(iter, wpa_s->conf->model_number,
error);
}
@ -705,12 +691,10 @@ dbus_bool_t wpas_dbus_getter_wps_device_serial_number(
DBusMessageIter *iter, DBusError *error, void *user_data)
{
struct wpa_supplicant *wpa_s = user_data;
char *model_number = wpa_s->conf->serial_number;
if (!model_number)
model_number = "";
return wpas_dbus_simple_property_getter(iter, DBUS_TYPE_STRING,
&model_number, error);
return wpas_dbus_string_property_getter(iter,
wpa_s->conf->serial_number,
error);
}