tunnel: use UdsChannelBuilder impl from grpc-android

Replace local unix domain socket implementation with UdsChannelBuilder
from grpc-android version 1.55.0-SNAPSHOT in maven local repository.

4 files changed, 4 insertions, 390 deletions

diff --git a/tunnel/build.gradle b/tunnel/build.gradle
index bb53f2e9..0c78b6ba 100644
--- a/tunnel/build.gradle
+++ b/tunnel/build.gradle
@@ -72,6 +72,7 @@ android {
 dependencies {
     implementation "androidx.annotation:annotation:$annotationsVersion"
     implementation "androidx.collection:collection:$collectionVersion"
+    implementation "io.grpc:grpc-android:$grpcVersion"
     implementation "io.grpc:grpc-okhttp:$grpcVersion"
     implementation "io.grpc:grpc-protobuf-lite:$grpcVersion"
     implementation "io.grpc:grpc-stub:$grpcVersion"
@@ -87,7 +88,7 @@ protobuf {
     }
     plugins {
         grpc {
-            artifact = "io.grpc:protoc-gen-grpc-java:$grpcVersion"
+            artifact = "io.grpc:protoc-gen-grpc-java:$protocGenGrpcVersion"
         }
     }
     generateProtoTasks {
diff --git a/tunnel/src/main/java/com/wireguard/android/backend/GoBackend.java b/tunnel/src/main/java/com/wireguard/android/backend/GoBackend.java
index 0ec2dbf5..98ce8d7d 100644
--- a/tunnel/src/main/java/com/wireguard/android/backend/GoBackend.java
+++ b/tunnel/src/main/java/com/wireguard/android/backend/GoBackend.java
@@ -34,6 +34,7 @@ import com.wireguard.util.NonNullForAll;
 
 import io.grpc.ManagedChannel;
 import io.grpc.ManagedChannelBuilder;
+import io.grpc.android.UdsChannelBuilder;
 import io.grpc.okhttp.OkHttpChannelBuilder;
 
 import java.io.File;
@@ -81,11 +82,7 @@ public final class GoBackend implements Backend {
         File socketFile = new File(context.getCacheDir(), "libwg.sock");
         String socketName = socketFile.getAbsolutePath();
         Log.i(TAG, "wgStartGrpc: " + wgStartGrpc(socketName));
-        ManagedChannelBuilder<?> channelBuilder = ManagedChannelBuilder.forAddress("localhost", 10000).usePlaintext();
-        LocalSocketAddress address = new LocalSocketAddress(socketName, LocalSocketAddress.Namespace.FILESYSTEM);
-        SocketFactory socketFactory = new UnixDomainSocketFactory(address);
-        ((OkHttpChannelBuilder) channelBuilder).socketFactory(socketFactory);
-        channel = channelBuilder.build();
+        channel = UdsChannelBuilder.forPath(socketName, LocalSocketAddress.Namespace.FILESYSTEM).build();
     }
 
     /**
diff --git a/tunnel/src/main/java/com/wireguard/android/backend/LocalSocketAdapter.java b/tunnel/src/main/java/com/wireguard/android/backend/LocalSocketAdapter.java
deleted file mode 100644
index bf027ae1..00000000
--- a/tunnel/src/main/java/com/wireguard/android/backend/LocalSocketAdapter.java
+++ /dev/null
@@ -1,325 +0,0 @@
-/*
- */
-package com.wireguard.android.backend;
-
-import java.io.File;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.net.InetAddress;
-import java.net.InetSocketAddress;
-import java.net.Socket;
-import java.net.SocketAddress;
-import java.net.SocketException;
-import java.net.SocketImplFactory;
-import java.net.SocketOptions;
-import java.nio.channels.SocketChannel;
-import java.util.Vector;
-import android.net.LocalSocket;
-import android.net.LocalSocketAddress;
-import android.util.Log;
-
-/**
- * Adaptor allows using a LocalSocket as a Socket.
- */
-final class LocalSocketAdapter extends Socket {
-    private final LocalSocketAddress address;
-    private final LocalSocket unix;
-    private final SocketAddress localAddress;
-    private InetSocketAddress inetSocketAddress;
-    private InputStream is;
-    private OutputStream os;
-
-    LocalSocketAdapter(LocalSocketAddress address) {
-        this.address = address;
-        this.localAddress = new InetSocketAddress(0);
-        unix = new LocalSocket();
-    }
-
-    LocalSocketAdapter(LocalSocketAddress address, InetSocketAddress inetAddress) {
-        this(address);
-        this.inetSocketAddress = inetAddress;
-    }
-
-    private void throwUnsupportedOperationException() {
-        Log.i("helloworld", "Unsupported: " + Log.getStackTraceString(new Exception()));
-        throw new UnsupportedOperationException();
-    }
-
-    @Override
-    public void bind (SocketAddress bindpoint) {
-        throwUnsupportedOperationException();
-    }
-
-    @Override
-    public void close() throws IOException {
-        unix.close();
-    }
-
-    @Override public void connect(SocketAddress endpoint) throws IOException {
-        this.inetSocketAddress = (InetSocketAddress) endpoint;
-        try {
-            unix.connect(address);
-        } catch (IOException e) {
-            Log.i("helloworld", "Error: " + e.toString());
-            throw e;
-        }
-    }
-
-    @Override
-    public void connect(SocketAddress endpoint, int timeout) throws IOException {
-        this.inetSocketAddress = (InetSocketAddress) endpoint;
-        unix.connect(address, timeout);
-    }
-
-    @Override
-    public SocketChannel getChannel() {
-        throwUnsupportedOperationException();
-        return null;
-    }
-
-    @Override public InetAddress getInetAddress() {
-        return inetSocketAddress.getAddress();
-    }
-
-    @Override
-    public InputStream getInputStream() throws IOException {
-        is = unix.getInputStream();
-        return is;
-    }
-
-    @Override
-    public boolean getKeepAlive() {
-        throwUnsupportedOperationException();
-        return false;
-    }
-
-    @Override
-    public InetAddress getLocalAddress() {
-        throwUnsupportedOperationException();
-        return null;
-    }
-
-    @Override
-    public int getLocalPort() {
-        throwUnsupportedOperationException();
-        return 0;
-    }
-
-    @Override
-    public SocketAddress getLocalSocketAddress() {
-        //throwUnsupportedOperationException();
-        return localAddress;
-    }
-
-    @Override
-    public boolean getOOBInline() {
-        throwUnsupportedOperationException();
-        return false;
-    }
-
-    @Override
-    public OutputStream getOutputStream() throws IOException {
-        if (os != null)
-            return os;
-
-        OutputStream unixOs = unix.getOutputStream();
-        os = new OutputStream() {
-                @Override
-                public void close() throws IOException {
-                    // LocalSocket's default implementation closes the socket,
-                    // which leaves readers of thes InputStream hanging.
-                    // Instead shutdown input (and output) to release readers.
-                    LocalSocketAdapter.this.shutdownInput();
-                    LocalSocketAdapter.this.shutdownOutput();
-                }
-
-                @Override
-                public void write (byte[] b) throws IOException {
-                    unixOs.write(b);
-                }
-
-                @Override
-                public void write (byte[] b, int off, int len) throws IOException {
-                    unixOs.write(b, off, len);
-                }
-
-                @Override
-                public void write (int b) throws IOException {
-                    unixOs.write(b);
-                }
-            };
-        return os;
-    }
-
-    @Override
-    public int getPort() {
-        return inetSocketAddress.getPort();
-    }
-
-    @Override
-    public int getReceiveBufferSize() throws SocketException {
-        try {
-            return unix.getReceiveBufferSize();
-        } catch (IOException e) {
-            throw new SocketException(e.getMessage());
-        }
-    }
-
-    @Override
-    public SocketAddress getRemoteSocketAddress() {
-        return inetSocketAddress;
-    }
-
-    @Override
-    public boolean getReuseAddress() {
-        throwUnsupportedOperationException();
-        return false;
-    }
-
-    @Override
-    public int getSendBufferSize() throws SocketException {
-        try {
-            return unix.getSendBufferSize();
-        } catch (IOException e) {
-            throw new SocketException(e.getMessage());
-        }
-    }
-
-    @Override
-    public int getSoLinger() {
-        throwUnsupportedOperationException();
-        return 0;
-    }
-
-    @Override
-    public int getSoTimeout() throws SocketException {
-        try {
-            return unix.getSoTimeout();
-        } catch (IOException e) {
-            throw new SocketException(e.getMessage());
-        }
-    }
-
-    @Override
-    public boolean getTcpNoDelay() {
-        throwUnsupportedOperationException();
-        return false;
-    }
-
-    @Override
-    public int getTrafficClass() {
-        throwUnsupportedOperationException();
-        return 0;
-    }
-
-    @Override
-    public boolean isBound() {
-        return unix.isBound();
-    }
-
-    @Override
-    public boolean isClosed() {
-        return unix.isClosed();
-    }
-
-    @Override
-    public boolean isConnected() {
-        return unix.isConnected();
-    }
-
-    @Override
-    public boolean isInputShutdown() {
-        return unix.isInputShutdown();
-    }
-
-    @Override
-    public boolean isOutputShutdown() {
-        return unix.isOutputShutdown();
-    }
-
-    @Override
-    public void sendUrgentData (int data) {
-        throwUnsupportedOperationException();
-    }
-
-    @Override
-    public void setKeepAlive (boolean on) {
-        throwUnsupportedOperationException();
-    }
-
-    @Override
-    public void setOOBInline (boolean on) {
-        throwUnsupportedOperationException();
-    }
-
-    @Override
-    public void setPerformancePreferences (int connectionTime,
-                                           int latency,
-                                           int bandwidth) {
-                throwUnsupportedOperationException();
-    }
-
-    @Override
-    public void setReceiveBufferSize(int size) throws SocketException {
-        try {
-            unix.setReceiveBufferSize(size);
-        } catch (IOException e) {
-            throw new SocketException(e.getMessage());
-        }
-    }
-
-    @Override
-    public void setReuseAddress (boolean on) {
-        throwUnsupportedOperationException();
-    }
-
-    @Override
-    public void setSendBufferSize(int size) throws SocketException {
-        try {
-            unix.setSendBufferSize(size);
-        } catch (IOException e) {
-            throw new SocketException(e.getMessage());
-        }
-    }
-
-    @Override
-    public void setSoLinger (boolean on,
-                             int linger) {
-        throwUnsupportedOperationException();
-    }
-
-    @Override
-    public void setSoTimeout(int timeout) throws SocketException {
-        try {
-            unix.setSoTimeout(timeout);
-        } catch (IOException e) {
-            throw new SocketException(e.getMessage());
-        }
-    }
-
-    @Override
-    public void setTcpNoDelay (boolean on) {
-        // Not relevant for local sockets.
-    }
-
-    @Override
-    public void setTrafficClass (int tc) {
-        throwUnsupportedOperationException();
-    }
-
-    @Override
-    public void shutdownInput() throws IOException {
-        unix.shutdownInput();
-    }
-
-    @Override
-    public void shutdownOutput() throws IOException {
-        unix.shutdownOutput();
-    }
-
-    @Override
-    public String toString() {
-        return unix.toString();
-    }
-}
diff --git a/tunnel/src/main/java/com/wireguard/android/backend/UnixDomainSocketFactory.java b/tunnel/src/main/java/com/wireguard/android/backend/UnixDomainSocketFactory.java
deleted file mode 100644
index 427a19f1..00000000
--- a/tunnel/src/main/java/com/wireguard/android/backend/UnixDomainSocketFactory.java
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- * Copyright (C) 2018 Square, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.wireguard.android.backend;
-
-import java.io.File;
-import java.io.IOException;
-import java.net.InetAddress;
-import java.net.InetSocketAddress;
-import java.net.Socket;
-import javax.net.SocketFactory;
-import android.net.LocalSocketAddress;
-
-/** Impersonate TCP-style SocketFactory over UNIX domain sockets. */
-public final class UnixDomainSocketFactory extends SocketFactory {
-  private final LocalSocketAddress address;
-
-  public UnixDomainSocketFactory(LocalSocketAddress address) {
-    this.address = address;
-  }
-
-  @Override public Socket createSocket() throws IOException {
-    return new LocalSocketAdapter(address);
-  }
-
-  @Override public Socket createSocket(String host, int port) throws IOException {
-    Socket result = createSocket();
-    result.connect(new InetSocketAddress(host, port));
-    return result;
-  }
-
-  @Override public Socket createSocket(
-      String host, int port, InetAddress localHost, int localPort) throws IOException {
-    return createSocket(host, port);
-  }
-
-  @Override public Socket createSocket(InetAddress host, int port) throws IOException {
-    Socket result = createSocket();
-    result.connect(new InetSocketAddress(host, port));
-    return result;
-  }
-
-  @Override public Socket createSocket(
-      InetAddress host, int port, InetAddress localAddress, int localPort) throws IOException {
-    return createSocket(host, port);
-  }
-}