1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.cts.appwithdata; 18 19 import android.content.ContentProvider; 20 import android.content.ContentValues; 21 import android.database.Cursor; 22 import android.net.TrafficStats; 23 import android.net.Uri; 24 import android.os.Bundle; 25 import android.os.ParcelFileDescriptor; 26 import android.system.Os; 27 import android.util.Log; 28 29 import java.io.IOException; 30 import java.net.ServerSocket; 31 import java.net.Socket; 32 33 public class MyProvider extends ContentProvider { 34 private static final String TAG = "CTS"; 35 36 @Override onCreate()37 public boolean onCreate() { 38 return true; 39 } 40 41 @Override query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder)42 public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, 43 String sortOrder) { 44 throw new UnsupportedOperationException(); 45 } 46 47 @Override getType(Uri uri)48 public String getType(Uri uri) { 49 throw new UnsupportedOperationException(); 50 } 51 52 @Override insert(Uri uri, ContentValues values)53 public Uri insert(Uri uri, ContentValues values) { 54 throw new UnsupportedOperationException(); 55 } 56 57 @Override delete(Uri uri, String selection, String[] selectionArgs)58 public int delete(Uri uri, String selection, String[] selectionArgs) { 59 throw new UnsupportedOperationException(); 60 } 61 62 @Override update(Uri uri, ContentValues values, String selection, String[] selectionArgs)63 public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) { 64 throw new UnsupportedOperationException(); 65 } 66 67 @Override call(String method, String arg, Bundle extras)68 public Bundle call(String method, String arg, Bundle extras) { 69 Log.v(TAG, "call() " + method); 70 switch (method) { 71 case "start": { 72 server = new EchoServer(); 73 server.start(); 74 extras = new Bundle(); 75 extras.putInt("port", server.server.getLocalPort()); 76 return extras; 77 } 78 case "stop": { 79 server.halt(); 80 return null; 81 } 82 case "tag": { 83 final int uid = Os.getuid(); 84 Log.v(TAG, "My UID is " + uid); 85 TrafficStats.setThreadStatsUid(uid); 86 if (TrafficStats.getThreadStatsUid() != uid) { 87 throw new AssertionError("TrafficStats UID mismatch!"); 88 } 89 try { 90 final ParcelFileDescriptor pfd = extras.getParcelable("fd"); 91 TrafficStats.tagFileDescriptor(pfd.getFileDescriptor()); 92 } catch (IOException e) { 93 throw new RuntimeException(e); 94 } finally { 95 TrafficStats.clearThreadStatsUid(); 96 } 97 return null; 98 } 99 default: { 100 throw new UnsupportedOperationException(); 101 } 102 } 103 } 104 105 private EchoServer server; 106 107 private static class EchoServer extends Thread { 108 final ServerSocket server; 109 volatile boolean halted = false; 110 EchoServer()111 public EchoServer() { 112 try { 113 server = new ServerSocket(0); 114 } catch (IOException e) { 115 throw new RuntimeException(e); 116 } 117 } 118 halt()119 public void halt() { 120 halted = true; 121 try { 122 server.close(); 123 } catch (IOException e) { 124 throw new RuntimeException(e); 125 } 126 } 127 128 @Override run()129 public void run() { 130 while (!halted) { 131 try { 132 final Socket socket = server.accept(); 133 socket.setTcpNoDelay(true); 134 final int val = socket.getInputStream().read(); 135 socket.getOutputStream().write(val); 136 socket.getOutputStream().flush(); 137 socket.close(); 138 } catch (IOException e) { 139 Log.w(TAG, e); 140 } 141 } 142 } 143 } 144 } 145