diff --git a/service/src/com/android/server/ConnectivityService.java b/service/src/com/android/server/ConnectivityService.java
index 85507f6..c2da84d 100755
--- a/service/src/com/android/server/ConnectivityService.java
+++ b/service/src/com/android/server/ConnectivityService.java
@@ -11353,7 +11353,7 @@
         public void onInterfaceLinkStateChanged(@NonNull String iface, boolean up) {
             mHandler.post(() -> {
                 for (NetworkAgentInfo nai : mNetworkAgentInfos) {
-                    nai.clatd.interfaceLinkStateChanged(iface, up);
+                    nai.clatd.handleInterfaceLinkStateChanged(iface, up);
                 }
             });
         }
@@ -11362,7 +11362,7 @@
         public void onInterfaceRemoved(@NonNull String iface) {
             mHandler.post(() -> {
                 for (NetworkAgentInfo nai : mNetworkAgentInfos) {
-                    nai.clatd.interfaceRemoved(iface);
+                    nai.clatd.handleInterfaceRemoved(iface);
                 }
             });
         }
diff --git a/service/src/com/android/server/connectivity/Nat464Xlat.java b/service/src/com/android/server/connectivity/Nat464Xlat.java
index f9e07fd..065922d 100644
--- a/service/src/com/android/server/connectivity/Nat464Xlat.java
+++ b/service/src/com/android/server/connectivity/Nat464Xlat.java
@@ -483,8 +483,9 @@
 
     /**
      * Adds stacked link on base link and transitions to RUNNING state.
+     * Must be called on the handler thread.
      */
-    private void handleInterfaceLinkStateChanged(String iface, boolean up) {
+    public void handleInterfaceLinkStateChanged(String iface, boolean up) {
         // TODO: if we call start(), then stop(), then start() again, and the
         // interfaceLinkStateChanged notification for the first start is delayed past the first
         // stop, then the code becomes out of sync with system state and will behave incorrectly.
@@ -499,6 +500,7 @@
         // Once this code is converted to StateMachine, it will be possible to use deferMessage to
         // ensure it stays in STARTING state until the interfaceLinkStateChanged notification fires,
         // and possibly use a timeout (or provide some guarantees at the lower layer) to address #1.
+        ensureRunningOnHandlerThread();
         if (!isStarting() || !up || !Objects.equals(mIface, iface)) {
             return;
         }
@@ -519,8 +521,10 @@
 
     /**
      * Removes stacked link on base link and transitions to IDLE state.
+     * Must be called on the handler thread.
      */
-    private void handleInterfaceRemoved(String iface) {
+    public void handleInterfaceRemoved(String iface) {
+        ensureRunningOnHandlerThread();
         if (!Objects.equals(mIface, iface)) {
             return;
         }
@@ -536,14 +540,6 @@
         stop();
     }
 
-    public void interfaceLinkStateChanged(String iface, boolean up) {
-        mNetwork.handler().post(() -> { handleInterfaceLinkStateChanged(iface, up); });
-    }
-
-    public void interfaceRemoved(String iface) {
-        mNetwork.handler().post(() -> handleInterfaceRemoved(iface));
-    }
-
     /**
      * Translate the input v4 address to v6 clat address.
      */