Ensure wifi ssid cannot exceed 32 bytes.

Change-Id: I5c2c50ca8599f6843da47c01b9a0447e2c85d763
Fix: 36898746
Test: make RunSettingsRoboTests

res/layout/wifi_dialog.xml

@@ -53,9 +53,21 @@
                         android:layout_height="wrap_content"
                         style="@style/wifi_item_edit_content"
                         android:hint="@string/wifi_ssid_hint"
-                        android:maxLength="32"
                         android:singleLine="true"
                         android:inputType="textNoSuggestions" />
+
+                <LinearLayout android:id="@+id/ssid_too_long_warning"
+                              android:layout_width="match_parent"
+                              android:layout_height="wrap_content"
+                              android:visibility="gone"
+                              style="@style/wifi_item" >
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        style="@style/wifi_item_warning"
+                        android:text="@string/wifi_ssid_too_long" />
+                </LinearLayout>
+
              </LinearLayout>
 
             <LinearLayout

res/values/strings.xml

@@ -1882,6 +1882,8 @@
     <string name="wifi_do_not_validate_eap_server">Do not validate</string>
     <!-- Warning message displayed if user choses not to validate the EAP server -->
     <string name="wifi_do_not_validate_eap_server_warning">No certificate specified. Your connection will not be private.</string>
+    <!-- Warning message displayed if network name (ssid) is too long -->
+    <string name="wifi_ssid_too_long">Network name is too long.</string>
     <!-- Warning message displayed if user does not specify a domain for the CA certificate.
          Only displayed if the user also chooses to use system certificates. -->
     <string name="wifi_no_domain_warning">Must specify a domain.</string>

src/com/android/settings/wifi/WifiConfigController.java

@@ -110,6 +110,8 @@ public class WifiConfigController implements TextWatcher,
     public static final int WIFI_PEAP_PHASE2_AKA        = 4;
     public static final int WIFI_PEAP_PHASE2_AKA_PRIME  = 5;
 
+    private static final int SSID_ASCII_MAX_LENGTH = 32;
+
     /* Phase2 methods supported by PEAP are limited */
     private final ArrayAdapter<String> mPhase2PeapAdapter;
     /* Full list of phase2 methods */
@@ -457,7 +459,14 @@ public class WifiConfigController implements TextWatcher,
     void showWarningMessagesIfAppropriate() {
         mView.findViewById(R.id.no_ca_cert_warning).setVisibility(View.GONE);
         mView.findViewById(R.id.no_domain_warning).setVisibility(View.GONE);
+        mView.findViewById(R.id.ssid_too_long_warning).setVisibility(View.GONE);
 
+        if (mSsidView != null) {
+            final String ssid = mSsidView.getText().toString();
+            if (ssid.length() > SSID_ASCII_MAX_LENGTH) {
+                mView.findViewById(R.id.ssid_too_long_warning).setVisibility(View.VISIBLE);
+            }
+        }
         if (mEapCaCertSpinner != null
                 && mView.findViewById(R.id.l_ca_cert).getVisibility() != View.GONE) {
             String caCertSelection = (String) mEapCaCertSpinner.getSelectedItem();

tests/robotests/src/com/android/settings/wifi/WifiConfigControllerTest.java

@@ -44,10 +44,14 @@ import static org.mockito.Mockito.when;
         shadows = ShadowConnectivityManager.class)
 public class WifiConfigControllerTest {
 
-    @Mock private WifiConfigUiBase mConfigUiBase;
+    @Mock
-    @Mock private Context mContext;
+    private WifiConfigUiBase mConfigUiBase;
-    @Mock private View mView;
+    @Mock
-    @Mock private AccessPoint mAccessPoint;
+    private Context mContext;
+    @Mock
+    private View mView;
+    @Mock
+    private AccessPoint mAccessPoint;
 
     public WifiConfigController mController;
 
@@ -73,6 +77,38 @@ public class WifiConfigControllerTest {
         mController = new TestWifiConfigController(mConfigUiBase, mView, mAccessPoint,
                 WifiConfigUiBase.MODE_CONNECT);
     }
+
+    @Test
+    public void ssidExceeds32Bytes_shouldShowSsidTooLongWarning() {
+        mController = new TestWifiConfigController(mConfigUiBase, mView, null /* accessPoint */,
+                WifiConfigUiBase.MODE_CONNECT);
+        final TextView ssid = mView.findViewById(R.id.ssid);
+        ssid.setText("☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎");
+        mController.showWarningMessagesIfAppropriate();
+
+        assertThat(mView.findViewById(R.id.ssid_too_long_warning).getVisibility())
+                .isEqualTo(View.VISIBLE);
+    }
+
+    @Test
+    public void ssidShorterThan32Bytes_shouldNotShowSsidTooLongWarning() {
+        mController = new TestWifiConfigController(mConfigUiBase, mView, null /* accessPoint */,
+                WifiConfigUiBase.MODE_CONNECT);
+
+        final TextView ssid = mView.findViewById(R.id.ssid);
+        ssid.setText("123456789012345678901234567890");
+        mController.showWarningMessagesIfAppropriate();
+
+        assertThat(mView.findViewById(R.id.ssid_too_long_warning).getVisibility())
+                .isEqualTo(View.GONE);
+
+        ssid.setText("123");
+        mController.showWarningMessagesIfAppropriate();
+
+        assertThat(mView.findViewById(R.id.ssid_too_long_warning).getVisibility())
+                .isEqualTo(View.GONE);
+    }
+
     @Test
     public void isSubmittable_noSSID_shouldReturnFalse() {
         final TextView ssid = mView.findViewById(R.id.ssid);
@@ -87,13 +123,14 @@ public class WifiConfigControllerTest {
         assertThat(mController.isSubmittable()).isFalse();
 
     }
+
     @Test
     public void isSubmittable_shortPsk_shouldReturnFalse() {
         final TextView password = mView.findViewById(R.id.password);
         password.setText(SHORT_PSK);
         assertThat(mController.isSubmittable()).isFalse();
-
     }
+
     @Test
     public void isSubmittable_goodPsk_shouldReturnTrue() {
         final TextView password = mView.findViewById(R.id.password);
@@ -101,6 +138,7 @@ public class WifiConfigControllerTest {
         assertThat(mController.isSubmittable()).isTrue();
 
     }
+
     @Test
     public void isSubmittable_savedConfigZeroLengthPassword_shouldReturnTrue() {
         final TextView password = mView.findViewById(R.id.password);