Add ability to match intents based on the package name of the intent sender

Change-Id: Iaf9feececcff9188b1b02751aff6c3ab541dc73d

services/core/java/com/android/server/firewall/IntentFirewall.java

@@ -95,6 +95,7 @@ public class IntentFirewall {
 
                 CategoryFilter.FACTORY,
                 SenderFilter.FACTORY,
+                SenderPackageFilter.FACTORY,
                 SenderPermissionFilter.FACTORY,
                 PortFilter.FACTORY
         };

services/core/java/com/android/server/firewall/SenderPackageFilter.java

@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.firewall;
+
+import android.app.AppGlobals;
+import android.content.ComponentName;
+import android.content.Intent;
+import android.content.pm.IPackageManager;
+import android.os.RemoteException;
+import android.os.UserHandle;
+
+import org.xmlpull.v1.XmlPullParser;
+import org.xmlpull.v1.XmlPullParserException;
+
+import java.io.IOException;
+
+public class SenderPackageFilter implements Filter {
+    private static final String ATTR_NAME = "name";
+
+    public final String mPackageName;
+
+    public SenderPackageFilter(String packageName) {
+        mPackageName = packageName;
+    }
+
+    @Override
+    public boolean matches(IntentFirewall ifw, ComponentName resolvedComponent, Intent intent,
+            int callerUid, int callerPid, String resolvedType, int receivingUid) {
+        IPackageManager pm = AppGlobals.getPackageManager();
+
+        int packageUid = -1;
+        try {
+            packageUid = pm.getPackageUid(mPackageName, UserHandle.USER_OWNER);
+        } catch (RemoteException ex) {
+            // handled below
+        }
+
+        if (packageUid == -1)  {
+            return false;
+        }
+
+        return UserHandle.isSameApp(packageUid, callerUid);
+    }
+
+    public static final FilterFactory FACTORY = new FilterFactory("sender-package") {
+        @Override
+        public Filter newFilter(XmlPullParser parser)
+                throws IOException, XmlPullParserException {
+            String packageName = parser.getAttributeValue(null, ATTR_NAME);
+
+            if (packageName == null) {
+                throw new XmlPullParserException(
+                    "A package name must be specified.", parser, null);
+            }
+
+            return new SenderPackageFilter(packageName);
+        }
+    };
+}