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Code Issues Projects Releases Wiki Activity

Inform Tor about network connectivity. Dev task #53.

Browse Source 
Note that some devices (I'm looking at you, Huawei U8110) misreport
connectivity by failing to set EXTRA_NO_CONNECTIVITY and returning true
from ConnectivityManager.getActiveNetworkInfo().isConnected() when
there's no connectivity.
This commit is contained in:
akwizgran
2014-01-09 14:45:41 +00:00
parent 0cebc42ddb
commit c779d7b95a
2 changed files with 57 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
briar-android/assets/torrc
View File

@@ -1,5 +1,6 @@
ControlPort 59051
CookieAuthentication 1
DisableNetwork 1
PidFile pid
RunAsDaemon 1
SafeSocks 1

70
briar-android/src/org/briarproject/plugins/tor/TorPlugin.java
View File

@@ -1,6 +1,8 @@
package org.briarproject.plugins.tor;
import static android.content.Context.MODE_PRIVATE;
import static android.net.ConnectivityManager.CONNECTIVITY_ACTION;
import static android.net.ConnectivityManager.EXTRA_NO_CONNECTIVITY;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static java.util.logging.Level.INFO;
import static java.util.logging.Level.WARNING;
@@ -28,6 +30,7 @@ import java.util.zip.ZipInputStream;
import net.freehaven.tor.control.EventHandler;
import net.freehaven.tor.control.TorControlConnection;
import org.briarproject.api.ContactId;
import org.briarproject.api.TransportConfig;
import org.briarproject.api.TransportId;
@@ -38,9 +41,13 @@ import org.briarproject.api.plugins.duplex.DuplexPlugin;
import org.briarproject.api.plugins.duplex.DuplexPluginCallback;
import org.briarproject.api.plugins.duplex.DuplexTransportConnection;
import org.briarproject.util.StringUtils;
import socks.Socks5Proxy;
import socks.SocksSocket;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Build;
import android.os.FileObserver;
@@ -75,6 +82,7 @@ class TorPlugin implements DuplexPlugin, EventHandler {
private volatile ServerSocket socket = null;
private volatile Socket controlSocket = null;
private volatile TorControlConnection controlConnection = null;
private volatile BroadcastReceiver networkStateReceiver = null;
TorPlugin(Executor pluginExecutor, Context appContext,
ShutdownManager shutdownManager, DuplexPluginCallback callback,
@@ -180,21 +188,14 @@ class TorPlugin implements DuplexPlugin, EventHandler {
// Now we should be able to connect to the new process
controlSocket = new Socket("127.0.0.1", CONTROL_PORT);
}
running = true;
// Read the PID of the Tor process so we can kill it if necessary
pid = readPidFile();
// Create a shutdown hook to ensure the Tor process is killed
shutdownManager.addShutdownHook(new Runnable() {
public void run() {
if(tor != null) {
if(LOG.isLoggable(INFO))
LOG.info("Killing Tor via destroy()");
tor.destroy();
}
if(pid != -1) {
if(LOG.isLoggable(INFO))
LOG.info("Killing Tor via killProcess(" + pid + ")");
android.os.Process.killProcess(pid);
}
killTorProcess();
killZombieProcess();
}
});
// Open a control connection and authenticate using the cookie file
@@ -203,7 +204,10 @@ class TorPlugin implements DuplexPlugin, EventHandler {
// Register to receive events from the Tor process
controlConnection.setEventHandler(this);
controlConnection.setEvents(Arrays.asList("NOTICE", "WARN", "ERR"));
running = true;
// Register to receive network status events
networkStateReceiver = new NetworkStateReceiver();
IntentFilter filter = new IntentFilter(CONNECTIVITY_ACTION);
appContext.registerReceiver(networkStateReceiver, filter);
// Bind a server socket to receive incoming hidden service connections
pluginExecutor.execute(new Runnable() {
public void run() {
@@ -368,6 +372,7 @@ class TorPlugin implements DuplexPlugin, EventHandler {
// Discard the header line
if(scanner.hasNextLine()) scanner.nextLine();
// Look for a Tor process with our package name
boolean found = false;
while(scanner.hasNextLine()) {
String[] columns = scanner.nextLine().split("\\s+");
if(columns.length < 3) break;
@@ -377,8 +382,10 @@ class TorPlugin implements DuplexPlugin, EventHandler {
if(LOG.isLoggable(INFO))
LOG.info("Killing zombie process " + pid);
android.os.Process.killProcess(pid);
found = true;
}
}
if(!found) if(LOG.isLoggable(INFO)) LOG.info("No zombies found");
scanner.close();
} catch(IOException e) {
if(LOG.isLoggable(WARNING))
@@ -388,6 +395,19 @@ class TorPlugin implements DuplexPlugin, EventHandler {
}
}
private void killTorProcess() {
if(tor != null) {
if(LOG.isLoggable(INFO))
LOG.info("Killing Tor via destroy()");
tor.destroy();
}
if(pid != -1) {
if(LOG.isLoggable(INFO))
LOG.info("Killing Tor via killProcess(" + pid + ")");
android.os.Process.killProcess(pid);
}
}
private void bind() {
// If there's already a port number stored in config, reuse it
String portString = callback.getConfig().get("port");
@@ -493,9 +513,17 @@ class TorPlugin implements DuplexPlugin, EventHandler {
}
}
private void enableNetwork(boolean enable) throws IOException {
if(!running) return;
if(LOG.isLoggable(INFO)) LOG.info("Enabling network: " + enable);
controlConnection.setConf("DisableNetwork", enable ? "0" : "1");
}
public void stop() throws IOException {
running = false;
if(socket != null) tryToClose(socket);
if(networkStateReceiver != null)
appContext.unregisterReceiver(networkStateReceiver);
try {
if(LOG.isLoggable(INFO)) LOG.info("Stopping Tor");
if(controlSocket == null)
@@ -504,13 +532,13 @@ class TorPlugin implements DuplexPlugin, EventHandler {
controlConnection = new TorControlConnection(controlSocket);
controlConnection.authenticate(read(cookieFile));
}
controlConnection.setConf("DisableNetwork", "1");
controlConnection.shutdownTor("TERM");
controlSocket.close();
} catch(IOException e) {
if(LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
if(LOG.isLoggable(INFO)) LOG.info("Killing Tor");
if(tor != null) tor.destroy();
if(pid != -1) android.os.Process.killProcess(pid);
killTorProcess();
killZombieProcess();
}
}
@@ -603,4 +631,18 @@ class TorPlugin implements DuplexPlugin, EventHandler {
latch.countDown();
}
}
private class NetworkStateReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context ctx, Intent i) {
// Note: Some devices fail to set this extra
boolean online = !i.getBooleanExtra(EXTRA_NO_CONNECTIVITY, false);
try {
enableNetwork(online);
} catch(IOException e) {
if(LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
}
}
}
}