wifidebug: Add GetWifiDebugMode to get the current wifi debug mode.

This may be useful in cases where SetWifiDebugMode has failed to
check what the current state/setting is.
Though if SetWifiDebugMode has failed we may be in weird state
so logs of steamos-manager should be checked to see what failed.

Signed-off-by: Jeremy Whiting <jpwhiting@kde.org>

com.steampowered.SteamOSManager1.xml

@@ -195,6 +195,16 @@
       <arg type="u" name="buffer_size" direction="in"/>
     </method>
 
+    <!--
+      GetWifiDebugMode:
+      @mode: 0 for off, 1 for on. Uses an integer for fleximility.
+
+      Get method for SetWifiDebugMode.
+    -->
+    <method name="GetWifiDebugMode">
+      <arg type="u" name="mode" direction="out"/>
+    </method>
+
   </interface>
 
 </node>

src/manager.rs

@@ -28,7 +28,7 @@ use tokio::{fs::File, io::AsyncWriteExt, process::Command};
 use zbus::zvariant::OwnedFd;
 use zbus_macros::dbus_interface;
 
-#[derive(PartialEq, Debug)]
+#[derive(PartialEq, Debug, Copy, Clone)]
 #[repr(u32)]
 enum WifiDebugMode {
     Off,
@@ -498,6 +498,11 @@ impl SMManager {
         }
     }
 
+    async fn get_wifi_debug_mode(&mut self) -> u32 {
+        // Get the wifi debug mode
+        self.wifi_debug_mode as u32
+    }
+
     async fn set_wifi_debug_mode(&mut self, mode: u32, buffer_size: u32) -> bool {
         // Set the wifi debug mode to mode, using an int for flexibility going forward but only
         // doing things on 0 or 1 for now