Update BluetoothAdapter#setScanMode to throw an IllegalArgumentException

when the the input is invalid

Tag: #feature
Bug: 202310885
Test: atest BluetoothHostTest#testSetScanMode
Ignore-AOSP-First: Fixing GTS test
Change-Id: I4cd64903de7c4b413f551ac6fd4703035e32c7b9

1 files changed, 5 insertions, 0 deletions

diff --git a/framework/java/android/bluetooth/BluetoothAdapter.java b/framework/java/android/bluetooth/BluetoothAdapter.java
index 0a2fb4fb44..e6f91bf128 100644
--- a/framework/java/android/bluetooth/BluetoothAdapter.java
+++ b/framework/java/android/bluetooth/BluetoothAdapter.java
@@ -1914,6 +1914,7 @@ public final class BluetoothAdapter {
      * @param mode represents the desired state of the local device scan mode
      *
      * @return status code indicating whether the scan mode was successfully set
+     * @throws IllegalArgumentException if the mode is not a valid scan mode
      * @hide
      */
     @SystemApi
@@ -1927,6 +1928,10 @@ public final class BluetoothAdapter {
         if (getState() != STATE_ON) {
             return BluetoothStatusCodes.ERROR_BLUETOOTH_NOT_ENABLED;
         }
+        if (mode != SCAN_MODE_NONE && mode != SCAN_MODE_CONNECTABLE
+                && mode != SCAN_MODE_CONNECTABLE_DISCOVERABLE) {
+            throw new IllegalArgumentException("Invalid scan mode param value");
+        }
         try {
             mServiceLock.readLock().lock();
             if (mService != null) {