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Backend: Add a function to enumerate running tunnels

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Signed-off-by: Samuel Holland <samuel@sholland.org>
This commit is contained in:
Samuel Holland 2018-01-06 05:07:17 -06:00
parent 2543f28274
commit 1c2239ae91
2 changed files with 27 additions and 16 deletions
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10
app/src/main/java/com/wireguard/android/backend/Backend.java
View File

@ -5,6 +5,8 @@ import com.wireguard.android.model.Tunnel.State;
import com.wireguard.android.model.Tunnel.Statistics;
import com.wireguard.config.Config;
import java.util.Set;
import java9.util.concurrent.CompletionStage;
/**
@ -25,6 +27,14 @@ public interface Backend {
*/
CompletionStage<Config> applyConfig(Tunnel tunnel, Config config);
/**
* Enumerate the names of currently-running tunnels.
*
* @return A future completed when the set of running tunnel names is available. This future
* will always be completed on the main thread.
*/
CompletionStage<Set<String>> enumerate();
/**
* Get the actual state of a tunnel, asynchronously.
*

33
app/src/main/java/com/wireguard/android/backend/WgQuickBackend.java
View File

@ -12,12 +12,15 @@ import com.wireguard.config.Config;
import java.io.File;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import java9.util.concurrent.CompletableFuture;
import java9.util.concurrent.CompletionStage;
import java9.util.stream.Collectors;
import java9.util.stream.Stream;
/**
* Created by samuel on 12/19/17.
@ -53,26 +56,24 @@ public final class WgQuickBackend implements Backend {
}
@Override
public CompletionStage<State> getState(final Tunnel tunnel) {
Log.v(TAG, "Requested state for tunnel " + tunnel.getName());
public CompletionStage<Set<String>> enumerate() {
return asyncWorker.supplyAsync(() -> {
final List<String> output = new LinkedList<>();
final State state;
if (rootShell.run(output, "wg show interfaces") != 0) {
state = State.UNKNOWN;
} else if (output.isEmpty()) {
// There are no running interfaces.
state = State.DOWN;
} else {
// wg puts all interface names on the same line. Split them into separate elements.
final String[] names = output.get(0).split(" ");
state = Arrays.asList(names).contains(tunnel.getName()) ? State.UP : State.DOWN;
}
Log.v(TAG, "Got state " + state + " for tunnel " + tunnel.getName());
return state;
// Don't throw an exception here or nothing will show up in the UI.
if (rootShell.run(output, "wg show interfaces") != 0 || output.isEmpty())
return Collections.emptySet();
// wg puts all interface names on the same line. Split them into separate elements.
return Stream.of(output.get(0).split(" "))
.collect(Collectors.toUnmodifiableSet());
});
}
@Override
public CompletionStage<State> getState(final Tunnel tunnel) {
Log.v(TAG, "Requested state for tunnel " + tunnel.getName());
return enumerate().thenApply(set -> set.contains(tunnel.getName()) ? State.UP : State.DOWN);
}
@Override
public CompletionStage<Statistics> getStatistics(final Tunnel tunnel) {
return CompletableFuture.completedFuture(new Statistics());