VancedMicroG/play-services-core/src/main/java/org/microg/gms/gcm/McsOutputStream.java

141 lines
4.3 KiB
Java

/*
* Copyright (C) 2013-2017 microG Project Team
*
* 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 org.microg.gms.gcm;
import static org.microg.gms.gcm.McsConstants.MCS_VERSION_CODE;
import static org.microg.gms.gcm.McsConstants.MSG_OUTPUT;
import static org.microg.gms.gcm.McsConstants.MSG_OUTPUT_DONE;
import static org.microg.gms.gcm.McsConstants.MSG_OUTPUT_ERROR;
import static org.microg.gms.gcm.McsConstants.MSG_OUTPUT_READY;
import static org.microg.gms.gcm.McsConstants.MSG_TEARDOWN;
import android.os.Handler;
import android.os.Looper;
import android.util.Log;
import com.squareup.wire.Message;
import java.io.Closeable;
import java.io.IOException;
import java.io.OutputStream;
public class McsOutputStream extends Thread implements Handler.Callback, Closeable {
private static final String TAG = "GmsGcmMcsOutput";
private final OutputStream os;
private boolean initialized;
private int version = MCS_VERSION_CODE;
private int streamId = 0;
private final Handler mainHandler;
private Handler myHandler;
private volatile boolean closed = false;
public McsOutputStream(OutputStream os, Handler mainHandler) {
this(os, mainHandler, false);
}
public McsOutputStream(OutputStream os, Handler mainHandler, boolean initialized) {
this.os = os;
this.mainHandler = mainHandler;
this.initialized = initialized;
setName("McsOutputStream");
}
public int getStreamId() {
return streamId;
}
@Override
public void run() {
Looper.prepare();
myHandler = new Handler(this);
mainHandler.dispatchMessage(mainHandler.obtainMessage(MSG_OUTPUT_READY));
Looper.loop();
}
@Override
public boolean handleMessage(android.os.Message msg) {
switch (msg.what) {
case MSG_OUTPUT:
try {
Log.d(TAG, "Outgoing message: " + msg.obj);
writeInternal((Message) msg.obj, msg.arg1);
mainHandler.dispatchMessage(mainHandler.obtainMessage(MSG_OUTPUT_DONE, msg.arg1, msg.arg2, msg.obj));
} catch (IOException e) {
if (closed) {
Log.d(TAG, "We were closed already. Ignoring IOException");
} else {
mainHandler.dispatchMessage(mainHandler.obtainMessage(MSG_OUTPUT_ERROR, e));
}
}
return true;
case MSG_TEARDOWN:
try {
os.close();
} catch (IOException ignored) {
}
try {
Looper.myLooper().quit();
} catch (Exception ignored) {
}
return true;
}
return false;
}
@Override
public void close() {
if (!closed) {
closed = true;
myHandler.getLooper().quit();
interrupt();
}
}
private synchronized void writeInternal(Message message, int tag) throws IOException {
if (!initialized) {
Log.d(TAG, "Write MCS version code: " + version);
os.write(version);
initialized = true;
}
os.write(tag);
byte[] bytes = message.encode();
writeVarint(os, bytes.length);
os.write(bytes);
os.flush();
streamId++;
}
private void writeVarint(OutputStream os, int value) throws IOException {
while (true) {
if ((value & ~0x7FL) == 0) {
os.write(value);
return;
} else {
os.write((value & 0x7F) | 0x80);
value >>>= 7;
}
}
}
public Handler getHandler() {
return myHandler;
}
}