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

                CategoryFilter.FACTORY,

                SenderFilter.FACTORY,

                SenderPackageFilter.FACTORY,

                SenderPermissionFilter.FACTORY,

                PortFilter.FACTORY

        };

/*

 * 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);

        }

    };

}