[PATCH BlueZ v3 1/3] gdbus: Add g_dbus_pending_property_get_sender

[Arkadiusz Bokowy <arkadiusz.bokowy@xxxxxxxxx>]

This function allows to retrieve D-Bus message sender name in a property
setter callback. Message sender name might be required to limit write
access to authorized clients only.
---
 gdbus/gdbus.h  |  1 +
 gdbus/object.c | 33 +++++++++++++++++++++++++--------
 2 files changed, 26 insertions(+), 8 deletions(-)

diff --git a/gdbus/gdbus.h b/gdbus/gdbus.h
index d7be17661..c1b182adb 100644
--- a/gdbus/gdbus.h
+++ b/gdbus/gdbus.h
@@ -308,6 +308,7 @@ guint g_dbus_add_properties_watch(DBusConnection *connection,
 gboolean g_dbus_remove_watch(DBusConnection *connection, guint tag);
 void g_dbus_remove_all_watches(DBusConnection *connection);
 
+const char *g_dbus_pending_property_get_sender(GDBusPendingPropertySet id);
 void g_dbus_pending_property_success(GDBusPendingPropertySet id);
 void g_dbus_pending_property_error_valist(GDBusPendingReply id,
 			const char *name, const char *format, va_list args);
diff --git a/gdbus/object.c b/gdbus/object.c
index 72d2d46e3..e40c7c5bc 100644
--- a/gdbus/object.c
+++ b/gdbus/object.c
@@ -430,28 +430,45 @@ static gboolean check_privilege(DBusConnection *conn, DBusMessage *msg,
 static GDBusPendingPropertySet next_pending_property = 1;
 static GSList *pending_property_set;
 
+static int pending_property_data_compare_id(const void *data,
+						const void *user_data)
+{
+	const struct property_data *propdata = data;
+	const GDBusPendingPropertySet *id = user_data;
+	return propdata->id - *id;
+}
+
 static struct property_data *remove_pending_property_data(
 						GDBusPendingPropertySet id)
 {
 	struct property_data *propdata;
 	GSList *l;
 
-	for (l = pending_property_set; l != NULL; l = l->next) {
-		propdata = l->data;
-		if (propdata->id != id)
-			continue;
-
-		break;
-	}
-
+	l = g_slist_find_custom(pending_property_set, &id,
+				pending_property_data_compare_id);
 	if (l == NULL)
 		return NULL;
 
+	propdata = l->data;
 	pending_property_set = g_slist_delete_link(pending_property_set, l);
 
 	return propdata;
 }
 
+const char *g_dbus_pending_property_get_sender(GDBusPendingPropertySet id)
+{
+	struct property_data *propdata;
+	GSList *l;
+
+	l = g_slist_find_custom(pending_property_set, &id,
+					pending_property_data_compare_id);
+	if (l == NULL)
+		return NULL;
+
+	propdata = l->data;
+	return dbus_message_get_sender(propdata->message);
+}
+
 void g_dbus_pending_property_success(GDBusPendingPropertySet id)
 {
 	struct property_data *propdata;
-- 
2.39.5