1059 lines
38 KiB
Java
1059 lines
38 KiB
Java
/**
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* Contains shared programming interfaces.
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* All iptables "communication" is handled by this class.
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*
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* Copyright (C) 2009-2010 Rodrigo Zechin Rosauro
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @author Rodrigo Zechin Rosauro
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* @version 1.0
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*/
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package org.torproject.android.service;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.FileReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.OutputStreamWriter;
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import java.io.StringReader;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.StringTokenizer;
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import org.torproject.android.R;
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import android.Manifest;
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import android.app.AlertDialog;
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import android.content.Context;
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import android.content.Intent;
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import android.content.SharedPreferences;
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import android.content.SharedPreferences.Editor;
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import android.content.pm.ApplicationInfo;
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import android.content.pm.PackageManager;
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import android.util.Log;
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import android.widget.Toast;
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/**
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* Contains shared programming interfaces.
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* All iptables "communication" is handled by this class.
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*/
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public final class IptablesManager {
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/** application version string */
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public static final String VERSION = "1.5.1-dev";
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/** special application UID used to indicate "any application" */
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public static final int SPECIAL_UID_ANY = -10;
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/** special application UID used to indicate the Linux Kernel */
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public static final int SPECIAL_UID_KERNEL = -11;
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/** root script filename */
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private static final String SCRIPT_FILE = "droidwall.sh";
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// Preferences
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public static final String PREFS_NAME = "DroidWallPrefs";
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public static final String PREF_3G_UIDS = "AllowedUids3G";
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public static final String PREF_WIFI_UIDS = "AllowedUidsWifi";
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public static final String PREF_PASSWORD = "Password";
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public static final String PREF_MODE = "BlockMode";
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public static final String PREF_ENABLED = "Enabled";
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public static final String PREF_LOGENABLED = "LogEnabled";
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// Modes
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public static final String MODE_WHITELIST = "whitelist";
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public static final String MODE_BLACKLIST = "blacklist";
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// Messages
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public static final String STATUS_CHANGED_MSG = "com.googlecode.droidwall.intent.action.STATUS_CHANGED";
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public static final String TOGGLE_REQUEST_MSG = "com.googlecode.droidwall.intent.action.TOGGLE_REQUEST";
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public static final String STATUS_EXTRA = "com.googlecode.droidwall.intent.extra.STATUS";
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// Cached applications
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public static DroidApp applications[] = null;
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// Do we have root access?
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private static boolean hasroot = false;
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// Flag indicating if this is an ARMv6 device (-1: unknown, 0: no, 1: yes)
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private static int isARMv6 = -1;
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/**
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* Display a simple alert box
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* @param ctx context
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* @param msg message
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*/
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public static void alert(Context ctx, CharSequence msg) {
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if (ctx != null) {
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new AlertDialog.Builder(ctx)
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.setNeutralButton(android.R.string.ok, null)
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.setMessage(msg)
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.show();
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}
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}
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/**
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* Check if this is an ARMv6 device
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* @return true if this is ARMv6
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*/
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private static boolean isARMv6() {
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if (isARMv6 == -1) {
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BufferedReader r = null;
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try {
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isARMv6 = 0;
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r = new BufferedReader(new FileReader("/proc/cpuinfo"));
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for (String line = r.readLine(); line != null; line = r.readLine()) {
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if (line.startsWith("Processor") && line.contains("ARMv6")) {
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isARMv6 = 1;
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break;
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} else if (line.startsWith("CPU architecture") && (line.contains("6TE") || line.contains("5TE"))) {
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isARMv6 = 1;
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break;
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}
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}
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} catch (Exception ex) {
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} finally {
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if (r != null) try {r.close();} catch (Exception ex) {}
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}
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}
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return (isARMv6 == 1);
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}
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/**
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* Create the generic shell script header used to determine which iptables binary to use.
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* @param ctx context
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* @return script header
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*/
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private static String scriptHeader(Context ctx) {
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final String dir = ctx.getDir("bin",0).getAbsolutePath();
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final String myiptables = dir + (isARMv6() ? "/iptables_g1" : "/iptables_n1");
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return "" +
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"IPTABLES=iptables\n" +
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"BUSYBOX=busybox\n" +
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"GREP=grep\n" +
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"ECHO=echo\n" +
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"# Try to find busybox\n" +
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"if " + dir + "/busybox_g1 --help >/dev/null 2>/dev/null ; then\n" +
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" BUSYBOX="+dir+"/busybox_g1\n" +
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" GREP=\"$BUSYBOX grep\"\n" +
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" ECHO=\"$BUSYBOX echo\"\n" +
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"elif busybox --help >/dev/null 2>/dev/null ; then\n" +
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" BUSYBOX=busybox\n" +
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"elif /system/xbin/busybox --help >/dev/null 2>/dev/null ; then\n" +
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" BUSYBOX=/system/xbin/busybox\n" +
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"elif /system/bin/busybox --help >/dev/null 2>/dev/null ; then\n" +
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" BUSYBOX=/system/bin/busybox\n" +
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"fi\n" +
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"# Try to find grep\n" +
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"if ! $ECHO 1 | $GREP -q 1 >/dev/null 2>/dev/null ; then\n" +
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" if $ECHO 1 | $BUSYBOX grep -q 1 >/dev/null 2>/dev/null ; then\n" +
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" GREP=\"$BUSYBOX grep\"\n" +
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" fi\n" +
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" # Grep is absolutely required\n" +
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" if ! $ECHO 1 | $GREP -q 1 >/dev/null 2>/dev/null ; then\n" +
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" $ECHO The grep command is required. DroidWall will not work.\n" +
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" exit 1\n" +
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" fi\n" +
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"fi\n" +
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"# Try to find iptables\n" +
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"if " + myiptables + " --version >/dev/null 2>/dev/null ; then\n" +
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" IPTABLES="+myiptables+"\n" +
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"fi\n" +
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"";
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}
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/**
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* Copies a raw resource file, given its ID to the given location
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* @param ctx context
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* @param resid resource id
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* @param file destination file
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* @param mode file permissions (E.g.: "755")
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* @throws IOException on error
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* @throws InterruptedException when interrupted
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*/
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private static void copyRawFile(Context ctx, int resid, File file, String mode) throws IOException, InterruptedException
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{
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final String abspath = file.getAbsolutePath();
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// Write the iptables binary
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final FileOutputStream out = new FileOutputStream(file);
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final InputStream is = ctx.getResources().openRawResource(resid);
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byte buf[] = new byte[1024];
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int len;
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while ((len = is.read(buf)) > 0) {
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out.write(buf, 0, len);
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}
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out.close();
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is.close();
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// Change the permissions
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Runtime.getRuntime().exec("chmod "+mode+" "+abspath).waitFor();
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}
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/**
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* Purge and re-add all rules (internal implementation).
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* @param ctx application context (mandatory)
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* @param uidsWifi list of selected UIDs for WIFI to allow or disallow (depending on the working mode)
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* @param uids3g list of selected UIDs for 2G/3G to allow or disallow (depending on the working mode)
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* @param showErrors indicates if errors should be alerted
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*/
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private static boolean applyIptablesRulesImpl(Context ctx, List<Integer> uidsWifi, List<Integer> uids3g, boolean showErrors) {
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if (ctx == null) {
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return false;
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}
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assertBinaries(ctx, showErrors);
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final String ITFS_WIFI[] = {"tiwlan+", "wlan+", "eth+"};
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final String ITFS_3G[] = {"rmnet+","pdp+","ppp+","uwbr+","wimax+","vsnet+"};
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final SharedPreferences prefs = ctx.getSharedPreferences(PREFS_NAME, 0);
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final boolean whitelist = prefs.getString(PREF_MODE, MODE_WHITELIST).equals(MODE_WHITELIST);
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final boolean blacklist = !whitelist;
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final boolean logenabled = ctx.getSharedPreferences(PREFS_NAME, 0).getBoolean(PREF_LOGENABLED, false);
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final StringBuilder script = new StringBuilder();
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try {
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int code;
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script.append(scriptHeader(ctx));
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script.append("" +
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"$IPTABLES --version || exit 1\n" +
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"# Create the droidwall chains if necessary\n" +
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"$IPTABLES -L droidwall >/dev/null 2>/dev/null || $IPTABLES --new droidwall || exit 2\n" +
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"$IPTABLES -L droidwall-3g >/dev/null 2>/dev/null || $IPTABLES --new droidwall-3g || exit 3\n" +
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"$IPTABLES -L droidwall-wifi >/dev/null 2>/dev/null || $IPTABLES --new droidwall-wifi || exit 4\n" +
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"$IPTABLES -L droidwall-reject >/dev/null 2>/dev/null || $IPTABLES --new droidwall-reject || exit 5\n" +
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"# Add droidwall chain to OUTPUT chain if necessary\n" +
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"$IPTABLES -L OUTPUT | $GREP -q droidwall || $IPTABLES -A OUTPUT -j droidwall || exit 6\n" +
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"# Flush existing rules\n" +
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"$IPTABLES -F droidwall || exit 7\n" +
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"$IPTABLES -F droidwall-3g || exit 8\n" +
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"$IPTABLES -F droidwall-wifi || exit 9\n" +
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"$IPTABLES -F droidwall-reject || exit 10\n" +
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"");
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// Check if logging is enabled
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if (logenabled) {
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script.append("" +
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"# Create the log and reject rules (ignore errors on the LOG target just in case it is not available)\n" +
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"$IPTABLES -A droidwall-reject -j LOG --log-prefix \"[DROIDWALL] \" --log-uid\n" +
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"$IPTABLES -A droidwall-reject -j REJECT || exit 11\n" +
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"");
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} else {
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script.append("" +
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"# Create the reject rule (log disabled)\n" +
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"$IPTABLES -A droidwall-reject -j REJECT || exit 11\n" +
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"");
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}
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if (whitelist && logenabled) {
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script.append("# Allow DNS lookups on white-list for a better logging (ignore errors)\n");
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script.append("$IPTABLES -A droidwall -p udp --dport 53 -j RETURN\n");
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}
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script.append("# Main rules (per interface)\n");
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for (final String itf : ITFS_3G) {
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script.append("$IPTABLES -A droidwall -o ").append(itf).append(" -j droidwall-3g || exit\n");
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}
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for (final String itf : ITFS_WIFI) {
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script.append("$IPTABLES -A droidwall -o ").append(itf).append(" -j droidwall-wifi || exit\n");
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}
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script.append("# Filtering rules\n");
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final String targetRule = (whitelist ? "RETURN" : "droidwall-reject");
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final boolean any_3g = uids3g.indexOf(SPECIAL_UID_ANY) >= 0;
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final boolean any_wifi = uidsWifi.indexOf(SPECIAL_UID_ANY) >= 0;
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if (whitelist && !any_wifi) {
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// When "white listing" wifi, we need to ensure that the dhcp and wifi users are allowed
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int uid = android.os.Process.getUidForName("dhcp");
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if (uid != -1) {
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script.append("# dhcp user\n");
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script.append("$IPTABLES -A droidwall-wifi -m owner --uid-owner ").append(uid).append(" -j RETURN || exit\n");
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}
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uid = android.os.Process.getUidForName("wifi");
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if (uid != -1) {
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script.append("# wifi user\n");
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script.append("$IPTABLES -A droidwall-wifi -m owner --uid-owner ").append(uid).append(" -j RETURN || exit\n");
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}
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}
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if (any_3g) {
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if (blacklist) {
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/* block any application on this interface */
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script.append("$IPTABLES -A droidwall-3g -j ").append(targetRule).append(" || exit\n");
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}
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} else {
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/* release/block individual applications on this interface */
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for (final Integer uid : uids3g) {
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if (uid >= 0) script.append("$IPTABLES -A droidwall-3g -m owner --uid-owner ").append(uid).append(" -j ").append(targetRule).append(" || exit\n");
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}
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}
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if (any_wifi) {
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if (blacklist) {
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/* block any application on this interface */
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script.append("$IPTABLES -A droidwall-wifi -j ").append(targetRule).append(" || exit\n");
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}
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} else {
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/* release/block individual applications on this interface */
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for (final Integer uid : uidsWifi) {
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if (uid >= 0) script.append("$IPTABLES -A droidwall-wifi -m owner --uid-owner ").append(uid).append(" -j ").append(targetRule).append(" || exit\n");
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}
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}
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if (whitelist) {
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if (!any_3g) {
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if (uids3g.indexOf(SPECIAL_UID_KERNEL) >= 0) {
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script.append("# hack to allow kernel packets on white-list\n");
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script.append("$IPTABLES -A droidwall-3g -m owner --uid-owner 0:999999999 -j droidwall-reject || exit\n");
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} else {
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script.append("$IPTABLES -A droidwall-3g -j droidwall-reject || exit\n");
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}
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}
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if (!any_wifi) {
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if (uidsWifi.indexOf(SPECIAL_UID_KERNEL) >= 0) {
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script.append("# hack to allow kernel packets on white-list\n");
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script.append("$IPTABLES -A droidwall-wifi -m owner --uid-owner 0:999999999 -j droidwall-reject || exit\n");
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} else {
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script.append("$IPTABLES -A droidwall-wifi -j droidwall-reject || exit\n");
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}
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}
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} else {
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if (uids3g.indexOf(SPECIAL_UID_KERNEL) >= 0) {
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script.append("# hack to BLOCK kernel packets on black-list\n");
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script.append("$IPTABLES -A droidwall-3g -m owner --uid-owner 0:999999999 -j RETURN || exit\n");
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script.append("$IPTABLES -A droidwall-3g -j droidwall-reject || exit\n");
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}
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if (uidsWifi.indexOf(SPECIAL_UID_KERNEL) >= 0) {
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script.append("# hack to BLOCK kernel packets on black-list\n");
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script.append("$IPTABLES -A droidwall-wifi -m owner --uid-owner 0:999999999 -j RETURN || exit\n");
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script.append("$IPTABLES -A droidwall-wifi -j droidwall-reject || exit\n");
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}
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}
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final StringBuilder res = new StringBuilder();
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code = runScriptAsRoot(ctx, script.toString(), res);
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if (showErrors && code != 0) {
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String msg = res.toString();
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Log.e("DroidWall", msg);
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// Remove unnecessary help message from output
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if (msg.indexOf("\nTry `iptables -h' or 'iptables --help' for more information.") != -1) {
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msg = msg.replace("\nTry `iptables -h' or 'iptables --help' for more information.", "");
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}
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alert(ctx, "Error applying iptables rules. Exit code: " + code + "\n\n" + msg.trim());
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} else {
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return true;
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}
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} catch (Exception e) {
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if (showErrors) alert(ctx, "error refreshing iptables: " + e);
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}
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return false;
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}
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/**
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* Purge and re-add all saved rules (not in-memory ones).
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* This is much faster than just calling "applyIptablesRules", since it don't need to read installed applications.
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* @param ctx application context (mandatory)
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* @param showErrors indicates if errors should be alerted
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*/
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public static boolean applySavedIptablesRules(Context ctx, boolean showErrors) {
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if (ctx == null) {
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return false;
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}
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final SharedPreferences prefs = ctx.getSharedPreferences(PREFS_NAME, 0);
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final String savedUids_wifi = prefs.getString(PREF_WIFI_UIDS, "");
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final String savedUids_3g = prefs.getString(PREF_3G_UIDS, "");
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final List<Integer> uids_wifi = new LinkedList<Integer>();
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if (savedUids_wifi.length() > 0) {
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// Check which applications are allowed on wifi
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final StringTokenizer tok = new StringTokenizer(savedUids_wifi, "|");
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while (tok.hasMoreTokens()) {
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final String uid = tok.nextToken();
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if (!uid.equals("")) {
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try {
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uids_wifi.add(Integer.parseInt(uid));
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} catch (Exception ex) {
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}
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}
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}
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}
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final List<Integer> uids_3g = new LinkedList<Integer>();
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if (savedUids_3g.length() > 0) {
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// Check which applications are allowed on 2G/3G
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final StringTokenizer tok = new StringTokenizer(savedUids_3g, "|");
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while (tok.hasMoreTokens()) {
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final String uid = tok.nextToken();
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if (!uid.equals("")) {
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try {
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uids_3g.add(Integer.parseInt(uid));
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} catch (Exception ex) {
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}
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}
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}
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}
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return applyIptablesRulesImpl(ctx, uids_wifi, uids_3g, showErrors);
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}
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|
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/**
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* Purge and re-add all rules.
|
|
* @param ctx application context (mandatory)
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* @param showErrors indicates if errors should be alerted
|
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*/
|
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public static boolean applyIptablesRules(Context ctx, boolean showErrors) {
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if (ctx == null) {
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return false;
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}
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saveRules(ctx);
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return applySavedIptablesRules(ctx, showErrors);
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}
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/**
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* Save current rules using the preferences storage.
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* @param ctx application context (mandatory)
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*/
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public static void saveRules(Context ctx) {
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final SharedPreferences prefs = ctx.getSharedPreferences(PREFS_NAME, 0);
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final DroidApp[] apps = getApps(ctx);
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// Builds a pipe-separated list of names
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final StringBuilder newuids_wifi = new StringBuilder();
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final StringBuilder newuids_3g = new StringBuilder();
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for (int i=0; i<apps.length; i++) {
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if (apps[i].selected_wifi) {
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if (newuids_wifi.length() != 0) newuids_wifi.append('|');
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newuids_wifi.append(apps[i].uid);
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}
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if (apps[i].selected_3g) {
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if (newuids_3g.length() != 0) newuids_3g.append('|');
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newuids_3g.append(apps[i].uid);
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}
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}
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|
// save the new list of UIDs
|
|
final Editor edit = prefs.edit();
|
|
edit.putString(PREF_WIFI_UIDS, newuids_wifi.toString());
|
|
edit.putString(PREF_3G_UIDS, newuids_3g.toString());
|
|
edit.commit();
|
|
}
|
|
|
|
/**
|
|
* Purge all iptables rules.
|
|
* @param ctx mandatory context
|
|
* @param showErrors indicates if errors should be alerted
|
|
* @return true if the rules were purged
|
|
*/
|
|
public static boolean purgeIptables(Context ctx, boolean showErrors) {
|
|
StringBuilder res = new StringBuilder();
|
|
try {
|
|
assertBinaries(ctx, showErrors);
|
|
int code = runScriptAsRoot(ctx, scriptHeader(ctx) +
|
|
"$IPTABLES -F droidwall\n" +
|
|
"$IPTABLES -F droidwall-reject\n" +
|
|
"$IPTABLES -F droidwall-3g\n" +
|
|
"$IPTABLES -F droidwall-wifi\n", res);
|
|
if (code == -1) {
|
|
if (showErrors) alert(ctx, "error purging iptables. exit code: " + code + "\n" + res);
|
|
return false;
|
|
}
|
|
return true;
|
|
} catch (Exception e) {
|
|
if (showErrors) alert(ctx, "error purging iptables: " + e);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Display iptables rules output
|
|
* @param ctx application context
|
|
*/
|
|
public static void showIptablesRules(Context ctx) {
|
|
try {
|
|
final StringBuilder res = new StringBuilder();
|
|
runScriptAsRoot(ctx, scriptHeader(ctx) +
|
|
"$ECHO $IPTABLES\n" +
|
|
"$IPTABLES -L -v\n", res);
|
|
alert(ctx, res);
|
|
} catch (Exception e) {
|
|
alert(ctx, "error: " + e);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Display logs
|
|
* @param ctx application context
|
|
* @return true if the clogs were cleared
|
|
*/
|
|
public static boolean clearLog(Context ctx) {
|
|
try {
|
|
final StringBuilder res = new StringBuilder();
|
|
int code = runScriptAsRoot(ctx, "dmesg -c >/dev/null || exit\n", res);
|
|
if (code != 0) {
|
|
alert(ctx, res);
|
|
return false;
|
|
}
|
|
return true;
|
|
} catch (Exception e) {
|
|
alert(ctx, "error: " + e);
|
|
}
|
|
return false;
|
|
}
|
|
/**
|
|
* Display logs
|
|
* @param ctx application context
|
|
*/
|
|
public static void showLog(Context ctx) {
|
|
try {
|
|
StringBuilder res = new StringBuilder();
|
|
int code = runScriptAsRoot(ctx, scriptHeader(ctx) +
|
|
"dmesg | $GREP DROIDWALL\n", res);
|
|
if (code != 0) {
|
|
if (res.length() == 0) {
|
|
res.append("Log is empty");
|
|
}
|
|
alert(ctx, res);
|
|
return;
|
|
}
|
|
final BufferedReader r = new BufferedReader(new StringReader(res.toString()));
|
|
final Integer unknownUID = -99;
|
|
res = new StringBuilder();
|
|
String line;
|
|
int start, end;
|
|
Integer appid;
|
|
final HashMap<Integer, LogInfo> map = new HashMap<Integer, LogInfo>();
|
|
LogInfo loginfo = null;
|
|
while ((line = r.readLine()) != null) {
|
|
if (line.indexOf("[DROIDWALL]") == -1) continue;
|
|
appid = unknownUID;
|
|
if (((start=line.indexOf("UID=")) != -1) && ((end=line.indexOf(" ", start)) != -1)) {
|
|
appid = Integer.parseInt(line.substring(start+4, end));
|
|
}
|
|
loginfo = map.get(appid);
|
|
if (loginfo == null) {
|
|
loginfo = new LogInfo();
|
|
map.put(appid, loginfo);
|
|
}
|
|
loginfo.totalBlocked += 1;
|
|
if (((start=line.indexOf("DST=")) != -1) && ((end=line.indexOf(" ", start)) != -1)) {
|
|
String dst = line.substring(start+4, end);
|
|
if (loginfo.dstBlocked.containsKey(dst)) {
|
|
loginfo.dstBlocked.put(dst, loginfo.dstBlocked.get(dst) + 1);
|
|
} else {
|
|
loginfo.dstBlocked.put(dst, 1);
|
|
}
|
|
}
|
|
}
|
|
final DroidApp[] apps = getApps(ctx);
|
|
for (Integer id : map.keySet()) {
|
|
res.append("App ID ");
|
|
if (id != unknownUID) {
|
|
res.append(id);
|
|
for (DroidApp app : apps) {
|
|
if (app.uid == id) {
|
|
res.append(" (").append(app.names[0]);
|
|
if (app.names.length > 1) {
|
|
res.append(", ...)");
|
|
} else {
|
|
res.append(")");
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
res.append("(kernel)");
|
|
}
|
|
loginfo = map.get(id);
|
|
res.append(" - Blocked ").append(loginfo.totalBlocked).append(" packets");
|
|
if (loginfo.dstBlocked.size() > 0) {
|
|
res.append(" (");
|
|
boolean first = true;
|
|
for (String dst : loginfo.dstBlocked.keySet()) {
|
|
if (!first) {
|
|
res.append(", ");
|
|
}
|
|
res.append(loginfo.dstBlocked.get(dst)).append(" packets for ").append(dst);
|
|
first = false;
|
|
}
|
|
res.append(")");
|
|
}
|
|
res.append("\n\n");
|
|
}
|
|
if (res.length() == 0) {
|
|
res.append("Log is empty");
|
|
}
|
|
alert(ctx, res);
|
|
} catch (Exception e) {
|
|
alert(ctx, "error: " + e);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param ctx application context (mandatory)
|
|
* @return a list of applications
|
|
*/
|
|
public static DroidApp[] getApps(Context ctx) {
|
|
if (applications != null) {
|
|
// return cached instance
|
|
return applications;
|
|
}
|
|
final SharedPreferences prefs = ctx.getSharedPreferences(PREFS_NAME, 0);
|
|
// allowed application names separated by pipe '|' (persisted)
|
|
final String savedUids_wifi = prefs.getString(PREF_WIFI_UIDS, "");
|
|
final String savedUids_3g = prefs.getString(PREF_3G_UIDS, "");
|
|
int selected_wifi[] = new int[0];
|
|
int selected_3g[] = new int[0];
|
|
if (savedUids_wifi.length() > 0) {
|
|
// Check which applications are allowed
|
|
final StringTokenizer tok = new StringTokenizer(savedUids_wifi, "|");
|
|
selected_wifi = new int[tok.countTokens()];
|
|
for (int i=0; i<selected_wifi.length; i++) {
|
|
final String uid = tok.nextToken();
|
|
if (!uid.equals("")) {
|
|
try {
|
|
selected_wifi[i] = Integer.parseInt(uid);
|
|
} catch (Exception ex) {
|
|
selected_wifi[i] = -1;
|
|
}
|
|
}
|
|
}
|
|
// Sort the array to allow using "Arrays.binarySearch" later
|
|
Arrays.sort(selected_wifi);
|
|
}
|
|
if (savedUids_3g.length() > 0) {
|
|
// Check which applications are allowed
|
|
final StringTokenizer tok = new StringTokenizer(savedUids_3g, "|");
|
|
selected_3g = new int[tok.countTokens()];
|
|
for (int i=0; i<selected_3g.length; i++) {
|
|
final String uid = tok.nextToken();
|
|
if (!uid.equals("")) {
|
|
try {
|
|
selected_3g[i] = Integer.parseInt(uid);
|
|
} catch (Exception ex) {
|
|
selected_3g[i] = -1;
|
|
}
|
|
}
|
|
}
|
|
// Sort the array to allow using "Arrays.binarySearch" later
|
|
Arrays.sort(selected_3g);
|
|
}
|
|
try {
|
|
final PackageManager pkgmanager = ctx.getPackageManager();
|
|
final List<ApplicationInfo> installed = pkgmanager.getInstalledApplications(0);
|
|
final HashMap<Integer, DroidApp> map = new HashMap<Integer, DroidApp>();
|
|
final Editor edit = prefs.edit();
|
|
boolean changed = false;
|
|
String name = null;
|
|
String cachekey = null;
|
|
DroidApp app = null;
|
|
for (final ApplicationInfo apinfo : installed) {
|
|
app = map.get(apinfo.uid);
|
|
// filter applications which are not allowed to access the Internet
|
|
if (app == null && PackageManager.PERMISSION_GRANTED != pkgmanager.checkPermission(Manifest.permission.INTERNET, apinfo.packageName)) {
|
|
continue;
|
|
}
|
|
// try to get the application label from our cache - getApplicationLabel() is horribly slow!!!!
|
|
cachekey = "cache.label."+apinfo.packageName;
|
|
name = prefs.getString(cachekey, "");
|
|
if (name.length() == 0) {
|
|
// get label and put on cache
|
|
name = pkgmanager.getApplicationLabel(apinfo).toString();
|
|
edit.putString(cachekey, name);
|
|
changed = true;
|
|
}
|
|
if (app == null) {
|
|
app = new DroidApp();
|
|
app.uid = apinfo.uid;
|
|
app.names = new String[] { name };
|
|
map.put(apinfo.uid, app);
|
|
} else {
|
|
final String newnames[] = new String[app.names.length + 1];
|
|
System.arraycopy(app.names, 0, newnames, 0, app.names.length);
|
|
newnames[app.names.length] = name;
|
|
app.names = newnames;
|
|
}
|
|
// check if this application is selected
|
|
if (!app.selected_wifi && Arrays.binarySearch(selected_wifi, app.uid) >= 0) {
|
|
app.selected_wifi = true;
|
|
}
|
|
if (!app.selected_3g && Arrays.binarySearch(selected_3g, app.uid) >= 0) {
|
|
app.selected_3g = true;
|
|
}
|
|
}
|
|
if (changed) {
|
|
edit.commit();
|
|
}
|
|
/* add special applications to the list */
|
|
final DroidApp special[] = {
|
|
new DroidApp(SPECIAL_UID_ANY,"(Any application) - Same as selecting all applications", false, false),
|
|
new DroidApp(SPECIAL_UID_KERNEL,"(Kernel) - Linux kernel", false, false),
|
|
new DroidApp(android.os.Process.getUidForName("root"), "(root) - Applications running as root", false, false),
|
|
new DroidApp(android.os.Process.getUidForName("media"), "Media server", false, false),
|
|
new DroidApp(android.os.Process.getUidForName("vpn"), "VPN networking", false, false),
|
|
new DroidApp(android.os.Process.getUidForName("shell"), "Linux shell", false, false),
|
|
};
|
|
for (int i=0; i<special.length; i++) {
|
|
app = special[i];
|
|
if (app.uid != -1 && !map.containsKey(app.uid)) {
|
|
// check if this application is allowed
|
|
if (Arrays.binarySearch(selected_wifi, app.uid) >= 0) {
|
|
app.selected_wifi = true;
|
|
}
|
|
if (Arrays.binarySearch(selected_3g, app.uid) >= 0) {
|
|
app.selected_3g = true;
|
|
}
|
|
map.put(app.uid, app);
|
|
}
|
|
}
|
|
applications = new DroidApp[map.size()];
|
|
int index = 0;
|
|
for (DroidApp application : map.values()) applications[index++] = application;
|
|
return applications;
|
|
} catch (Exception e) {
|
|
alert(ctx, "error: " + e);
|
|
}
|
|
return null;
|
|
}
|
|
/**
|
|
* Check if we have root access
|
|
* @param ctx mandatory context
|
|
* @param showErrors indicates if errors should be alerted
|
|
* @return boolean true if we have root
|
|
*/
|
|
public static boolean hasRootAccess(Context ctx, boolean showErrors) {
|
|
if (hasroot) return true;
|
|
final StringBuilder res = new StringBuilder();
|
|
try {
|
|
// Run an empty script just to check root access
|
|
if (runScriptAsRoot(ctx, "exit 0", res) == 0) {
|
|
hasroot = true;
|
|
return true;
|
|
}
|
|
} catch (Exception e) {
|
|
}
|
|
if (showErrors) {
|
|
alert(ctx, "Could not acquire root access.\n" +
|
|
"You need a rooted phone to run DroidWall.\n\n" +
|
|
"If this phone is already rooted, please make sure DroidWall has enough permissions to execute the \"su\" command.\n" +
|
|
"Error message: " + res.toString());
|
|
}
|
|
return false;
|
|
}
|
|
/**
|
|
* Runs a script, wither as root or as a regular user (multiple commands separated by "\n").
|
|
* @param ctx mandatory context
|
|
* @param script the script to be executed
|
|
* @param res the script output response (stdout + stderr)
|
|
* @param timeout timeout in milliseconds (-1 for none)
|
|
* @return the script exit code
|
|
*/
|
|
public static int runScript(Context ctx, String script, StringBuilder res, long timeout, boolean asroot) {
|
|
final File file = new File(ctx.getDir("bin",0), SCRIPT_FILE);
|
|
final ScriptRunner runner = new ScriptRunner(file, script, res, asroot);
|
|
runner.start();
|
|
try {
|
|
if (timeout > 0) {
|
|
runner.join(timeout);
|
|
} else {
|
|
runner.join();
|
|
}
|
|
if (runner.isAlive()) {
|
|
// Timed-out
|
|
runner.interrupt();
|
|
runner.join(150);
|
|
runner.destroy();
|
|
runner.join(50);
|
|
}
|
|
} catch (InterruptedException ex) {}
|
|
return runner.exitcode;
|
|
}
|
|
/**
|
|
* Runs a script as root (multiple commands separated by "\n").
|
|
* @param ctx mandatory context
|
|
* @param script the script to be executed
|
|
* @param res the script output response (stdout + stderr)
|
|
* @param timeout timeout in milliseconds (-1 for none)
|
|
* @return the script exit code
|
|
*/
|
|
public static int runScriptAsRoot(Context ctx, String script, StringBuilder res, long timeout) {
|
|
return runScript(ctx, script, res, timeout, true);
|
|
}
|
|
/**
|
|
* Runs a script as root (multiple commands separated by "\n") with a default timeout of 20 seconds.
|
|
* @param ctx mandatory context
|
|
* @param script the script to be executed
|
|
* @param res the script output response (stdout + stderr)
|
|
* @param timeout timeout in milliseconds (-1 for none)
|
|
* @return the script exit code
|
|
* @throws IOException on any error executing the script, or writing it to disk
|
|
*/
|
|
public static int runScriptAsRoot(Context ctx, String script, StringBuilder res) throws IOException {
|
|
return runScriptAsRoot(ctx, script, res, 40000);
|
|
}
|
|
/**
|
|
* Runs a script as a regular user (multiple commands separated by "\n") with a default timeout of 20 seconds.
|
|
* @param ctx mandatory context
|
|
* @param script the script to be executed
|
|
* @param res the script output response (stdout + stderr)
|
|
* @param timeout timeout in milliseconds (-1 for none)
|
|
* @return the script exit code
|
|
* @throws IOException on any error executing the script, or writing it to disk
|
|
*/
|
|
public static int runScript(Context ctx, String script, StringBuilder res) throws IOException {
|
|
return runScript(ctx, script, res, 40000, false);
|
|
}
|
|
/**
|
|
* Asserts that the binary files are installed in the cache directory.
|
|
* @param ctx context
|
|
* @param showErrors indicates if errors should be alerted
|
|
* @return false if the binary files could not be installed
|
|
*/
|
|
public static boolean assertBinaries(Context ctx, boolean showErrors) {
|
|
boolean changed = false;
|
|
try {
|
|
// Check iptables_g1
|
|
File file = new File(ctx.getDir("bin",0), "iptables");
|
|
|
|
if ((!file.exists()) && isARMv6()) {
|
|
copyRawFile(ctx, R.raw.iptables_g1, file, "755");
|
|
changed = true;
|
|
}
|
|
|
|
// Check iptables_n1
|
|
file = new File(ctx.getDir("bin",0), "iptables");
|
|
if ((!file.exists()) && (!isARMv6())) {
|
|
copyRawFile(ctx, R.raw.iptables_n1, file, "755");
|
|
changed = true;
|
|
}
|
|
|
|
// Check busybox
|
|
/*
|
|
file = new File(ctx.getDir("bin",0), "busybox_g1");
|
|
if (!file.exists()) {
|
|
copyRawFile(ctx, R.raw.busybox_g1, file, "755");
|
|
changed = true;
|
|
}
|
|
*/
|
|
|
|
if (changed) {
|
|
Toast.makeText(ctx, R.string.status_install_success, Toast.LENGTH_LONG).show();
|
|
}
|
|
} catch (Exception e) {
|
|
if (showErrors) alert(ctx, "Error installing binary files: " + e);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
/**
|
|
* Check if the firewall is enabled
|
|
* @param ctx mandatory context
|
|
* @return boolean
|
|
*/
|
|
public static boolean isEnabled(Context ctx) {
|
|
if (ctx == null) return false;
|
|
return ctx.getSharedPreferences(PREFS_NAME, 0).getBoolean(PREF_ENABLED, false);
|
|
}
|
|
|
|
/**
|
|
* Defines if the firewall is enabled and broadcasts the new status
|
|
* @param ctx mandatory context
|
|
* @param enabled enabled flag
|
|
*/
|
|
public static void setEnabled(Context ctx, boolean enabled) {
|
|
if (ctx == null) return;
|
|
final SharedPreferences prefs = ctx.getSharedPreferences(PREFS_NAME, 0);
|
|
if (prefs.getBoolean(PREF_ENABLED, false) == enabled) {
|
|
return;
|
|
}
|
|
final Editor edit = prefs.edit();
|
|
edit.putBoolean(PREF_ENABLED, enabled);
|
|
if (!edit.commit()) {
|
|
alert(ctx, "Error writing to preferences");
|
|
return;
|
|
}
|
|
/* notify */
|
|
final Intent message = new Intent(IptablesManager.STATUS_CHANGED_MSG);
|
|
message.putExtra(IptablesManager.STATUS_EXTRA, enabled);
|
|
ctx.sendBroadcast(message);
|
|
}
|
|
/**
|
|
* Called when an application in removed (un-installed) from the system.
|
|
* This will look for that application in the selected list and update the persisted values if necessary
|
|
* @param ctx mandatory app context
|
|
* @param uid UID of the application that has been removed
|
|
*/
|
|
public static void applicationRemoved(Context ctx, int uid) {
|
|
final SharedPreferences prefs = ctx.getSharedPreferences(PREFS_NAME, 0);
|
|
final Editor editor = prefs.edit();
|
|
// allowed application names separated by pipe '|' (persisted)
|
|
final String savedUids_wifi = prefs.getString(PREF_WIFI_UIDS, "");
|
|
final String savedUids_3g = prefs.getString(PREF_3G_UIDS, "");
|
|
final String uid_str = uid + "";
|
|
boolean changed = false;
|
|
// look for the removed application in the "wi-fi" list
|
|
if (savedUids_wifi.length() > 0) {
|
|
final StringBuilder newuids = new StringBuilder();
|
|
final StringTokenizer tok = new StringTokenizer(savedUids_wifi, "|");
|
|
while (tok.hasMoreTokens()) {
|
|
final String token = tok.nextToken();
|
|
if (uid_str.equals(token)) {
|
|
Log.d("DroidWall", "Removing UID " + token + " from the wi-fi list (package removed)!");
|
|
changed = true;
|
|
} else {
|
|
if (newuids.length() > 0) newuids.append('|');
|
|
newuids.append(token);
|
|
}
|
|
}
|
|
if (changed) {
|
|
editor.putString(PREF_WIFI_UIDS, newuids.toString());
|
|
}
|
|
}
|
|
// look for the removed application in the "3g" list
|
|
if (savedUids_3g.length() > 0) {
|
|
final StringBuilder newuids = new StringBuilder();
|
|
final StringTokenizer tok = new StringTokenizer(savedUids_3g, "|");
|
|
while (tok.hasMoreTokens()) {
|
|
final String token = tok.nextToken();
|
|
if (uid_str.equals(token)) {
|
|
Log.d("DroidWall", "Removing UID " + token + " from the 3G list (package removed)!");
|
|
changed = true;
|
|
} else {
|
|
if (newuids.length() > 0) newuids.append('|');
|
|
newuids.append(token);
|
|
}
|
|
}
|
|
if (changed) {
|
|
editor.putString(PREF_3G_UIDS, newuids.toString());
|
|
}
|
|
}
|
|
// if anything has changed, save the new prefs...
|
|
if (changed) {
|
|
editor.commit();
|
|
if (isEnabled(ctx)) {
|
|
// .. and also re-apply the rules if the firewall is enabled
|
|
applySavedIptablesRules(ctx, false);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Small structure to hold an application info
|
|
*/
|
|
public static final class DroidApp {
|
|
/** linux user id */
|
|
int uid;
|
|
/** application names belonging to this user id */
|
|
String names[];
|
|
/** indicates if this application is selected for wifi */
|
|
boolean selected_wifi;
|
|
/** indicates if this application is selected for 3g */
|
|
boolean selected_3g;
|
|
/** toString cache */
|
|
String tostr;
|
|
|
|
public DroidApp() {
|
|
}
|
|
public DroidApp(int uid, String name, boolean selected_wifi, boolean selected_3g) {
|
|
this.uid = uid;
|
|
this.names = new String[] {name};
|
|
this.selected_wifi = selected_wifi;
|
|
this.selected_3g = selected_3g;
|
|
}
|
|
/**
|
|
* Screen representation of this application
|
|
*/
|
|
@Override
|
|
public String toString() {
|
|
if (tostr == null) {
|
|
final StringBuilder s = new StringBuilder();
|
|
if (uid > 0) s.append(uid + ": ");
|
|
for (int i=0; i<names.length; i++) {
|
|
if (i != 0) s.append(", ");
|
|
s.append(names[i]);
|
|
}
|
|
s.append("\n");
|
|
tostr = s.toString();
|
|
}
|
|
return tostr;
|
|
}
|
|
}
|
|
/**
|
|
* Small internal structure used to hold log information
|
|
*/
|
|
private static final class LogInfo {
|
|
private int totalBlocked; // Total number of packets blocked
|
|
private HashMap<String, Integer> dstBlocked; // Number of packets blocked per destination IP address
|
|
private LogInfo() {
|
|
this.dstBlocked = new HashMap<String, Integer>();
|
|
}
|
|
}
|
|
/**
|
|
* Internal thread used to execute scripts (as root or not).
|
|
*/
|
|
private static final class ScriptRunner extends Thread {
|
|
private final File file;
|
|
private final String script;
|
|
private final StringBuilder res;
|
|
private final boolean asroot;
|
|
public int exitcode = -1;
|
|
private Process exec;
|
|
|
|
/**
|
|
* Creates a new script runner.
|
|
* @param file temporary script file
|
|
* @param script script to run
|
|
* @param res response output
|
|
* @param asroot if true, executes the script as root
|
|
*/
|
|
public ScriptRunner(File file, String script, StringBuilder res, boolean asroot) {
|
|
this.file = file;
|
|
this.script = script;
|
|
this.res = res;
|
|
this.asroot = asroot;
|
|
}
|
|
@Override
|
|
public void run() {
|
|
try {
|
|
file.createNewFile();
|
|
final String abspath = file.getAbsolutePath();
|
|
// make sure we have execution permission on the script file
|
|
Runtime.getRuntime().exec("chmod 777 "+abspath).waitFor();
|
|
// Write the script to be executed
|
|
final OutputStreamWriter out = new OutputStreamWriter(new FileOutputStream(file));
|
|
if (new File("/system/bin/sh").exists()) {
|
|
out.write("#!/system/bin/sh\n");
|
|
}
|
|
out.write(script);
|
|
if (!script.endsWith("\n")) out.write("\n");
|
|
out.write("exit\n");
|
|
out.flush();
|
|
out.close();
|
|
if (this.asroot) {
|
|
// Create the "su" request to run the script
|
|
exec = Runtime.getRuntime().exec("su -c "+abspath);
|
|
} else {
|
|
// Create the "sh" request to run the script
|
|
exec = Runtime.getRuntime().exec("sh "+abspath);
|
|
}
|
|
InputStreamReader r = new InputStreamReader(exec.getInputStream());
|
|
final char buf[] = new char[1024];
|
|
int read = 0;
|
|
// Consume the "stdout"
|
|
while ((read=r.read(buf)) != -1) {
|
|
if (res != null) res.append(buf, 0, read);
|
|
}
|
|
// Consume the "stderr"
|
|
r = new InputStreamReader(exec.getErrorStream());
|
|
read=0;
|
|
while ((read=r.read(buf)) != -1) {
|
|
if (res != null) res.append(buf, 0, read);
|
|
}
|
|
// get the process exit code
|
|
if (exec != null) this.exitcode = exec.waitFor();
|
|
} catch (InterruptedException ex) {
|
|
if (res != null) res.append("\nOperation timed-out");
|
|
} catch (Exception ex) {
|
|
if (res != null) res.append("\n" + ex);
|
|
} finally {
|
|
destroy();
|
|
}
|
|
}
|
|
/**
|
|
* Destroy this script runner
|
|
*/
|
|
public synchronized void destroy() {
|
|
if (exec != null) exec.destroy();
|
|
exec = null;
|
|
}
|
|
}
|
|
}
|