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Code Issues Projects Releases Wiki Activity

Watch for creation rather than updating of Tor cookie file.

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Tor writes to a temporary file and then renames it over the old
file, if any, so CLOSE_WRITE never occurs. The old code was
working in most cases because it received IGNORED when the old
file was unlinked and didn't check the event type.
This commit is contained in:
akwizgran
2018-06-01 17:07:41 +01:00
parent 624e03a2c9
commit d4a9c41cf5
1 changed files with 27 additions and 26 deletions
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53
bramble-android/src/main/java/org/briarproject/bramble/plugin/tor/TorPlugin.java
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@@ -185,18 +185,15 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
if (used.getAndSet(true)) throw new IllegalStateException();
// Install or update the assets if necessary
if (!assetsAreUpToDate()) installAssets();
LOG.info("Starting Tor");
// Watch for the auth cookie file being updated
try {
cookieFile.getParentFile().mkdirs();
cookieFile.createNewFile();
} catch (IOException e) {
throw new PluginException(e);
}
// Watch for the auth cookie file being created
if (cookieFile.getParentFile().mkdirs())
LOG.info("Created directory for cookie file");
if (cookieFile.delete()) LOG.info("Deleted old cookie file");
CountDownLatch latch = new CountDownLatch(1);
FileObserver obs = new WriteObserver(cookieFile, latch);
FileObserver obs = new CreateObserver(cookieFile, latch);
obs.startWatching();
// Start a new Tor process
LOG.info("Starting Tor");
String torPath = torFile.getAbsolutePath();
String configPath = configFile.getAbsolutePath();
String pid = String.valueOf(android.os.Process.myPid());
@@ -364,7 +361,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
File[] children = f.listFiles();
if (children != null) for (File child : children) listFiles(child);
} else {
LOG.info(f.getAbsolutePath());
LOG.info(f.getAbsolutePath() + " " + f.length());
}
}
@@ -641,22 +638,6 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
LOG.info("Descriptor uploaded");
}
private static class WriteObserver extends FileObserver {
private final CountDownLatch latch;
private WriteObserver(File file, CountDownLatch latch) {
super(file.getAbsolutePath(), CLOSE_WRITE);
this.latch = latch;
}
@Override
public void onEvent(int event, @Nullable String path) {
stopWatching();
latch.countDown();
}
}
@Override
public void eventOccurred(Event e) {
if (e instanceof SettingsUpdatedEvent) {
@@ -717,6 +698,26 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
if (oldConnectivityCheck != null) oldConnectivityCheck.cancel(false);
}
private static class CreateObserver extends FileObserver {
private final File file;
private final CountDownLatch latch;
private CreateObserver(File file, CountDownLatch latch) {
super(file.getParentFile().getAbsolutePath(), CREATE | MOVED_TO);
this.file = file;
this.latch = latch;
}
@Override
public void onEvent(int event, @Nullable String path) {
if (file.exists()) {
stopWatching();
latch.countDown();
}
}
}
private class NetworkStateReceiver extends BroadcastReceiver {
@Override