1 /* 2 * Copyright (C) 2011 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.example.android.toyvpn; 18 19 import android.app.Activity; 20 import android.content.Intent; 21 import android.content.SharedPreferences; 22 import android.net.VpnService; 23 import android.os.Bundle; 24 import android.widget.RadioButton; 25 import android.widget.TextView; 26 import android.widget.Toast; 27 28 import java.util.Arrays; 29 import java.util.Collections; 30 import java.util.Set; 31 import java.util.stream.Collectors; 32 33 public class ToyVpnClient extends Activity { 34 public interface Prefs { 35 String NAME = "connection"; 36 String SERVER_ADDRESS = "server.address"; 37 String SERVER_PORT = "server.port"; 38 String SHARED_SECRET = "shared.secret"; 39 String PROXY_HOSTNAME = "proxyhost"; 40 String PROXY_PORT = "proxyport"; 41 String ALLOW = "allow"; 42 String PACKAGES = "packages"; 43 } 44 45 @Override onCreate(Bundle savedInstanceState)46 public void onCreate(Bundle savedInstanceState) { 47 super.onCreate(savedInstanceState); 48 setContentView(R.layout.form); 49 50 final TextView serverAddress = findViewById(R.id.address); 51 final TextView serverPort = findViewById(R.id.port); 52 final TextView sharedSecret = findViewById(R.id.secret); 53 final TextView proxyHost = findViewById(R.id.proxyhost); 54 final TextView proxyPort = findViewById(R.id.proxyport); 55 56 final RadioButton allowed = findViewById(R.id.allowed); 57 final TextView packages = findViewById(R.id.packages); 58 59 final SharedPreferences prefs = getSharedPreferences(Prefs.NAME, MODE_PRIVATE); 60 serverAddress.setText(prefs.getString(Prefs.SERVER_ADDRESS, "")); 61 int serverPortPrefValue = prefs.getInt(Prefs.SERVER_PORT, 0); 62 serverPort.setText(String.valueOf(serverPortPrefValue == 0 ? "" : serverPortPrefValue)); 63 sharedSecret.setText(prefs.getString(Prefs.SHARED_SECRET, "")); 64 proxyHost.setText(prefs.getString(Prefs.PROXY_HOSTNAME, "")); 65 int proxyPortPrefValue = prefs.getInt(Prefs.PROXY_PORT, 0); 66 proxyPort.setText(proxyPortPrefValue == 0 ? "" : String.valueOf(proxyPortPrefValue)); 67 68 allowed.setChecked(prefs.getBoolean(Prefs.ALLOW, true)); 69 packages.setText(String.join(", ", prefs.getStringSet( 70 Prefs.PACKAGES, Collections.emptySet()))); 71 72 findViewById(R.id.connect).setOnClickListener(v -> { 73 if (!checkProxyConfigs(proxyHost.getText().toString(), 74 proxyPort.getText().toString())) { 75 return; 76 } 77 78 final Set<String> packageSet = 79 Arrays.stream(packages.getText().toString().split(",")) 80 .map(String::trim) 81 .filter(s -> !s.isEmpty()) 82 .collect(Collectors.toSet()); 83 if (!checkPackages(packageSet)) { 84 return; 85 } 86 87 int serverPortNum; 88 try { 89 serverPortNum = Integer.parseInt(serverPort.getText().toString()); 90 } catch (NumberFormatException e) { 91 serverPortNum = 0; 92 } 93 int proxyPortNum; 94 try { 95 proxyPortNum = Integer.parseInt(proxyPort.getText().toString()); 96 } catch (NumberFormatException e) { 97 proxyPortNum = 0; 98 } 99 prefs.edit() 100 .putString(Prefs.SERVER_ADDRESS, serverAddress.getText().toString()) 101 .putInt(Prefs.SERVER_PORT, serverPortNum) 102 .putString(Prefs.SHARED_SECRET, sharedSecret.getText().toString()) 103 .putString(Prefs.PROXY_HOSTNAME, proxyHost.getText().toString()) 104 .putInt(Prefs.PROXY_PORT, proxyPortNum) 105 .putBoolean(Prefs.ALLOW, allowed.isChecked()) 106 .putStringSet(Prefs.PACKAGES, packageSet) 107 .commit(); 108 Intent intent = VpnService.prepare(ToyVpnClient.this); 109 if (intent != null) { 110 startActivityForResult(intent, 0); 111 } else { 112 onActivityResult(0, RESULT_OK, null); 113 } 114 }); 115 findViewById(R.id.disconnect).setOnClickListener(v -> { 116 startService(getServiceIntent().setAction(ToyVpnService.ACTION_DISCONNECT)); 117 }); 118 } 119 checkProxyConfigs(String proxyHost, String proxyPort)120 private boolean checkProxyConfigs(String proxyHost, String proxyPort) { 121 final boolean hasIncompleteProxyConfigs = proxyHost.isEmpty() != proxyPort.isEmpty(); 122 if (hasIncompleteProxyConfigs) { 123 Toast.makeText(this, R.string.incomplete_proxy_settings, Toast.LENGTH_SHORT).show(); 124 } 125 return !hasIncompleteProxyConfigs; 126 } 127 checkPackages(Set<String> packageNames)128 private boolean checkPackages(Set<String> packageNames) { 129 final boolean hasCorrectPackageNames = packageNames.isEmpty() || 130 getPackageManager().getInstalledPackages(0).stream() 131 .map(pi -> pi.packageName) 132 .collect(Collectors.toSet()) 133 .containsAll(packageNames); 134 if (!hasCorrectPackageNames) { 135 Toast.makeText(this, R.string.unknown_package_names, Toast.LENGTH_SHORT).show(); 136 } 137 return hasCorrectPackageNames; 138 } 139 140 @Override onActivityResult(int request, int result, Intent data)141 protected void onActivityResult(int request, int result, Intent data) { 142 if (result == RESULT_OK) { 143 startService(getServiceIntent().setAction(ToyVpnService.ACTION_CONNECT)); 144 } 145 } 146 getServiceIntent()147 private Intent getServiceIntent() { 148 return new Intent(this, ToyVpnService.class); 149 } 150 } 151