1 /* 2 * Copyright (C) 2014 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.net.hostside; 18 19 import android.content.Intent; 20 import android.net.Network; 21 import android.net.ProxyInfo; 22 import android.net.VpnService; 23 import android.os.ParcelFileDescriptor; 24 import android.content.pm.PackageManager.NameNotFoundException; 25 import android.text.TextUtils; 26 import android.util.Log; 27 28 import java.io.IOException; 29 import java.net.InetAddress; 30 import java.net.UnknownHostException; 31 import java.util.ArrayList; 32 33 public class MyVpnService extends VpnService { 34 35 private static String TAG = "MyVpnService"; 36 private static int MTU = 1799; 37 38 public static final String ACTION_ESTABLISHED = "com.android.cts.net.hostside.ESTABNLISHED"; 39 public static final String EXTRA_ALWAYS_ON = "is-always-on"; 40 public static final String EXTRA_LOCKDOWN_ENABLED = "is-lockdown-enabled"; 41 42 private ParcelFileDescriptor mFd = null; 43 private PacketReflector mPacketReflector = null; 44 45 @Override 46 public int onStartCommand(Intent intent, int flags, int startId) { 47 String packageName = getPackageName(); 48 String cmd = intent.getStringExtra(packageName + ".cmd"); 49 if ("disconnect".equals(cmd)) { 50 stop(); 51 } else if ("connect".equals(cmd)) { 52 start(packageName, intent); 53 } 54 55 return START_NOT_STICKY; 56 } 57 58 private void start(String packageName, Intent intent) { 59 Builder builder = new Builder(); 60 61 String addresses = intent.getStringExtra(packageName + ".addresses"); 62 if (addresses != null) { 63 String[] addressArray = addresses.split(","); 64 for (int i = 0; i < addressArray.length; i++) { 65 String[] prefixAndMask = addressArray[i].split("/"); 66 try { 67 InetAddress address = InetAddress.getByName(prefixAndMask[0]); 68 int prefixLength = Integer.parseInt(prefixAndMask[1]); 69 builder.addAddress(address, prefixLength); 70 } catch (UnknownHostException|NumberFormatException| 71 ArrayIndexOutOfBoundsException e) { 72 continue; 73 } 74 } 75 } 76 77 String routes = intent.getStringExtra(packageName + ".routes"); 78 if (routes != null) { 79 String[] routeArray = routes.split(","); 80 for (int i = 0; i < routeArray.length; i++) { 81 String[] prefixAndMask = routeArray[i].split("/"); 82 try { 83 InetAddress address = InetAddress.getByName(prefixAndMask[0]); 84 int prefixLength = Integer.parseInt(prefixAndMask[1]); 85 builder.addRoute(address, prefixLength); 86 } catch (UnknownHostException|NumberFormatException| 87 ArrayIndexOutOfBoundsException e) { 88 continue; 89 } 90 } 91 } 92 93 String allowed = intent.getStringExtra(packageName + ".allowedapplications"); 94 if (allowed != null) { 95 String[] packageArray = allowed.split(","); 96 for (int i = 0; i < packageArray.length; i++) { 97 String allowedPackage = packageArray[i]; 98 if (!TextUtils.isEmpty(allowedPackage)) { 99 try { 100 builder.addAllowedApplication(allowedPackage); 101 } catch(NameNotFoundException e) { 102 continue; 103 } 104 } 105 } 106 } 107 108 String disallowed = intent.getStringExtra(packageName + ".disallowedapplications"); 109 if (disallowed != null) { 110 String[] packageArray = disallowed.split(","); 111 for (int i = 0; i < packageArray.length; i++) { 112 String disallowedPackage = packageArray[i]; 113 if (!TextUtils.isEmpty(disallowedPackage)) { 114 try { 115 builder.addDisallowedApplication(disallowedPackage); 116 } catch(NameNotFoundException e) { 117 continue; 118 } 119 } 120 } 121 } 122 123 ArrayList<Network> underlyingNetworks = 124 intent.getParcelableArrayListExtra(packageName + ".underlyingNetworks"); 125 if (underlyingNetworks == null) { 126 // VPN tracks default network 127 builder.setUnderlyingNetworks(null); 128 } else { 129 builder.setUnderlyingNetworks(underlyingNetworks.toArray(new Network[0])); 130 } 131 132 boolean isAlwaysMetered = intent.getBooleanExtra(packageName + ".isAlwaysMetered", false); 133 builder.setMetered(isAlwaysMetered); 134 135 ProxyInfo vpnProxy = intent.getParcelableExtra(packageName + ".httpProxy"); 136 builder.setHttpProxy(vpnProxy); 137 builder.setMtu(MTU); 138 builder.setBlocking(true); 139 builder.setSession("MyVpnService"); 140 141 Log.i(TAG, "Establishing VPN," 142 + " addresses=" + addresses 143 + " routes=" + routes 144 + " allowedApplications=" + allowed 145 + " disallowedApplications=" + disallowed); 146 147 mFd = builder.establish(); 148 Log.i(TAG, "Established, fd=" + (mFd == null ? "null" : mFd.getFd())); 149 150 broadcastEstablished(); 151 152 mPacketReflector = new PacketReflector(mFd.getFileDescriptor(), MTU); 153 mPacketReflector.start(); 154 } 155 156 private void broadcastEstablished() { 157 final Intent bcIntent = new Intent(ACTION_ESTABLISHED); 158 bcIntent.putExtra(EXTRA_ALWAYS_ON, isAlwaysOn()); 159 bcIntent.putExtra(EXTRA_LOCKDOWN_ENABLED, isLockdownEnabled()); 160 sendBroadcast(bcIntent); 161 } 162 163 private void stop() { 164 if (mPacketReflector != null) { 165 mPacketReflector.interrupt(); 166 mPacketReflector = null; 167 } 168 try { 169 if (mFd != null) { 170 Log.i(TAG, "Closing filedescriptor"); 171 mFd.close(); 172 } 173 } catch(IOException e) { 174 } finally { 175 mFd = null; 176 } 177 } 178 179 @Override 180 public void onDestroy() { 181 stop(); 182 super.onDestroy(); 183 } 184 } 185
